CN110010087B - Driving method and driving system of display panel and display device - Google Patents
Driving method and driving system of display panel and display device Download PDFInfo
- Publication number
- CN110010087B CN110010087B CN201910275101.2A CN201910275101A CN110010087B CN 110010087 B CN110010087 B CN 110010087B CN 201910275101 A CN201910275101 A CN 201910275101A CN 110010087 B CN110010087 B CN 110010087B
- Authority
- CN
- China
- Prior art keywords
- signal
- color
- brightness
- saturation
- normalization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application discloses a driving method, a driving system and a display device of a display panel, comprising the following steps: receiving a first color signal, converting the first color signal into a first brightness normalization signal, and converting according to the first brightness normalization signal to obtain a first hue saturation brightness space signal; acquiring a color saturation signal of the first color hue saturation brightness space signal, and adjusting the color saturation value of the color saturation signal to obtain a second color saturation signal so as to obtain a second color hue saturation brightness space signal; lowering the minimum value in the first brightness normalization signal according to the second hue saturation brightness space signal to obtain a second brightness normalization signal; converting the second brightness normalization signal to obtain a second color signal; the display panel is driven using the second color signal. The color cast problem can be effectively improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving method, a driving system and a display device for a display panel.
Background
With the development and progress of science and technology, the lcd has thin body, low power consumption, low radiation, and other hot spots, and thus is the mainstream product of the lcd and widely used. Most of the lcds are Backlight lcds, which include a liquid crystal panel and a Backlight Module (Backlight Module). The liquid crystal panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and a driving voltage is applied to the two glass substrates to control the rotation direction of the liquid crystal molecules so as to refract light rays of the backlight module out to generate a picture.
The large-size liquid crystal display panel mostly adopts a VA (Vertical Alignment) liquid crystal technology or an IPS (In-Plane switching) liquid crystal technology, and the VA liquid crystal technology has the advantages of higher production efficiency and lower manufacturing cost compared with the IPS liquid crystal technology, but has a more obvious optical property defect compared with the IPS liquid crystal technology In terms of optical property; namely, some large-sized display panels, especially VA-mode liquid crystal driving, have a color shift problem at a large viewing angle.
Disclosure of Invention
The application aims to provide a driving method, a driving system and a display device of a display panel, which effectively improve the condition of color cast of the display panel.
The application discloses a driving method of a display panel, which comprises the following steps:
receiving a first color signal, converting the first color signal into a first brightness normalization signal, and converting according to the first brightness normalization signal to obtain a first hue saturation brightness space signal;
acquiring a color saturation signal of the first color hue saturation brightness space signal, and adjusting the color saturation value of the color saturation signal to obtain a second color saturation signal so as to obtain a second color hue saturation brightness space signal;
lowering the minimum value in the first brightness normalization signal according to the second hue saturation brightness space signal to obtain a second brightness normalization signal;
converting the second brightness normalization signal to obtain a second color signal;
the display panel is driven using the second color signal.
Optionally, the step of obtaining a color saturation signal of the first color hue saturation luminance spatial signal, and adjusting a color saturation value of the color saturation signal to obtain a second color hue saturation luminance spatial signal includes: acquiring an adjusting coefficient according to the color tone of the first color tone saturation brightness space signal; adjusting the color saturation value of the color saturation signal s according to the adjustment coefficient to obtain a second color saturation signal s'; the adjustment coefficient satisfies the following formula: s' ═ a × S4+b×S3+c×S2+ dXS + e; wherein s is a color saturation signal and s' is a second color saturation signal; and a, b, c, d and e are constants.
Optionally, the step of receiving the first color signal, converting the first color signal into a first luminance normalization signal, and obtaining a first hue saturation luminance spatial signal according to the first luminance normalization signal includes: inputting a first color signal into a gray scale digital signal; converting the gray scale digital signals to obtain first brightness normalization signals r, g and b; wherein R ═ R (R/255) ^ γ R, G ^ γ G, B ^ B (B/255) ^ γ B, where γ R, γ G, γ B are gamma signals; the formula for converting the first luminance normalization signals r, g, b into the hue h and saturation signal s is as follows:
wherein max represents the maximum value of r/g/b, and min represents the minimum value of r/g/b.
Optionally, the step of lowering the minimum value in the first luminance normalization signal according to the second hue saturation luminance spatial signal to obtain a second luminance normalization signal includes: the first luminance normalization signal includes: a first red luminance normalization signal r, a first green luminance normalization signal g and a first blue luminance normalization signal b; the second luminance normalization signal includes: a second red luminance normalization signal r ', a second green luminance normalization signal g ' and a second blue luminance normalization signal b '; acquiring a minimum value min in the first red brightness normalization signal r, the first green brightness normalization signal g and the first blue brightness normalization signal b according to the tone of the second tone color saturation brightness space signal; and according to the color saturation signal s and the second color saturation signal s ', reducing the minimum value min in the first red brightness normalization signal r, the first green brightness normalization signal g and the first blue brightness normalization signal b to obtain an adjusted minimum value min ' so as to obtain a second red brightness normalization signal r ', a first green brightness normalization signal g ' and a first blue brightness normalization signal b '.
Optionally, the step of obtaining the minimum value min of the first luminance normalization signal according to the hue of the second hue saturation luminance spatial signal includes: when the dominant hue is red, max is r; determining the smaller value of the first brightness normalization signals g and b corresponding to the green and the blue as the minimum value of the first brightness normalization signals; when the dominant hue is green, max is g; determining the smaller value of the first brightness normalization signals r and g corresponding to the red and the blue as the minimum value of the first brightness normalization signals; when the dominant hue is blue, max is b; and determining the smaller value of the first brightness normalization signals r and g corresponding to the red and the green as the minimum value of the first brightness normalization signals.
Optionally, the step of obtaining the second color signal according to the conversion of the second luminance normalization signal includes: converting the second brightness normalization signal into a second color signal according to the following calculation formula: r '255 × (R')1/γr、G’＝255×(g’)1/γg、B’＝255×(b’)1/γb(ii) a Wherein r ', g ' and b ' are second luminance normalization signals; r ', G ', B ' are second color signals.
Optionally, in the step of adjusting the color saturation value of the color saturation signal s according to the adjustment coefficient to obtain a second color saturation signal s': the color difference Δ uv of the color saturation signal and the second color saturation signal satisfies the following formula:
where u _1 and v _1 are the chromaticity coordinates of the color saturation signal and u _2 and v _2 are the chromaticity coordinates of the second color saturation signal.
Optionally, the step of obtaining an adjustment coefficient according to a hue of the first hue saturation luminance space signal:
dividing the hue H into m hue intervals; obtaining adjustment coefficients a (H (m)), c (H (m)), d (H (m)), and e (H (m)) according to the hue interval; wherein, the more serious the color cast, the larger the adjustment coefficient; the color saturation signal S and a second color saturation signal S' (h (m), S) corresponding to the hue interval satisfy the 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 the adjustment constants of hue interval to saturation.
The application also discloses a driving system of the display panel, and the driving method using the display panel comprises a receiving module, an adjusting module, a calculating module, a converting module and a driving module; the receiving module receives a first color signal, converts the first color signal into a first brightness normalization signal, and converts the first brightness normalization signal into a first hue saturation brightness space signal; the adjusting module acquires a color saturation signal of the first color hue saturation brightness space signal, and adjusts the color saturation value of the color saturation signal to obtain a second color saturation signal so as to acquire a second color hue saturation brightness space signal; the calculation module reduces the minimum value in the first brightness normalization signal according to the second hue saturation brightness space signal to obtain a second brightness normalization signal; the conversion module converts the second brightness normalization signal to obtain a second color signal; the driving module drives the display panel by using the second color signal.
The application also discloses a display device, which comprises the driving system of the display panel and the display panel driven by the driving system.
In the RGB color system, because of more mixed color components except the main tone, the color cast is more serious; the color mixing proportion is reduced by reducing the minimum value in the first brightness normalization signal, so that the aim of improving the color saturation is fulfilled; so can improve the purity of dominant hue, so can weaken display panel's colour cast problem, make display panel's color more gorgeous simultaneously, this scheme does not sacrifice display panel's aperture opening ratio, and the effectual condition of having avoided display panel's luminousness to reduce takes place.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of color shift variation of large viewing angle and front viewing angle of various representative color systems in a liquid crystal display panel;
FIG. 2 is a first comparative schematic diagram of indistinguishable primary and secondary pixels and distinguishable primary and secondary pixels;
FIG. 3 is a second comparative schematic diagram of indistinguishable primary and secondary pixels;
FIG. 4 is a schematic diagram of a display device according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a driving system for a display panel according to an embodiment of the present application
Fig. 6 is a flowchart of a driving method of a display panel according to an embodiment of the present application;
FIG. 7 is a schematic illustration of a color saturation signal and a second color saturation signal variation of an embodiment of the present application;
FIG. 8 is a schematic illustration of a color saturation signal and a second color saturation signal variation for another embodiment of the present application;
FIG. 9 is a schematic diagram of a variation of a color difference between a color saturation signal and a second color saturation signal of an embodiment of the present application;
FIG. 10 is a schematic illustration of a variation of color difference for different colors of a color saturation signal and a second color saturation signal of another embodiment of the present application;
FIG. 11 is a schematic illustration of a tonal representation according to an embodiment of the present application.
100, a display device; 200. a drive system; 300. a display panel; 210. a receiving module; 220. an adjustment module; 230. a calculation module; 240. a conversion module; 250. and a driving module.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present application is described in detail below with reference to the figures and alternative embodiments.
The large-sized liquid crystal display panel mostly adopts a negative VA (Vertical Alignment) liquid crystal technology or an IPS (In-plane Switch) liquid crystal technology, and the VA liquid crystal technology has the advantages of higher production efficiency and lower manufacturing cost compared with the IPS liquid crystal technology, but has a defect of more obvious optical property compared with the IPS liquid crystal technology In terms of optical property, and particularly, the large-sized panel needs a larger viewing angle In terms of commercial application.
FIG. 1 is a schematic diagram of color shift variation of large viewing angle and front viewing angle of various representative color systems in a liquid crystal display panel; as shown in fig. 1, when the hue is close to the pure R (red), G (green), and B (blue), the color shift deterioration observed at the viewing angle is more remarkable, and when the hue is close to R, G, B, the color shift phenomenon becomes more remarkable because R, G, B pure hue has other color components.
An exemplary solution is to subdivide the RGB Sub-pixels into primary and secondary (Main/Sub) pixels so that the overall large-view luminance is closer to front view as the voltage varies. Fig. 2 is a schematic diagram of a first comparison without distinguishing primary and secondary pixels, and fig. 3 is a schematic diagram of a second comparison without distinguishing primary and secondary pixels, as can be seen with reference to fig. 2 and 3, wherein x, y and z coordinates represent three directions of a three-dimensional space, respectively; θ a denotes the pretilt angle at which the main pixel has a large voltage, and θ B denotes the pretilt angle at which the sub pixel has a small voltage. In fig. 3, the abscissa is a gray scale signal, and the ordinate is a luminance signal, and at a large viewing angle, the luminance is rapidly saturated with the signal, which causes a color shift problem (fig. 3, a left arc segment) at the large viewing angle, and the problem can be improved to a certain extent by distinguishing the primary and secondary pixels.
The ratio of brightness change corresponding to high-voltage side-view angle voltage in the liquid crystal display is easier to be saturated, so that an original signal can be divided into a large voltage and a small voltage to be seen as a graph shown in figure 3, the front-view large voltage and the small voltage are used for maintaining the change of the original front-view signal along with the brightness, the side-view brightness seen by the large voltage changes along with the gray scale as a Part A in figure 3, the side-view brightness seen by the small voltage changes along with the gray scale as a Part B in figure 3, and thus the brightness seen by the side-view synthesis is closer to the relation that the front-view brightness changes along with the gray scale, so that the relation of the visual angle brightness along with the signal changes is close to the relation that the front-view original signal brightness changes along with the signal, and the visual angle is improved.
The defect of color shift of viewing angle is solved by applying different driving voltages to the main and sub-pixels in space, so that the design of the pixel usually needs to design a metal wire or a Thin Film Transistor (TFT) element to drive the sub-pixel, which results in the sacrifice of a light-permeable opening area, influences the penetration rate of a panel, and directly causes the improvement of the backlight cost.
As shown in fig. 4, as an embodiment of the present application, a display device 100 is disclosed, which includes a display panel driving system 200 and a display panel 300.
As shown in fig. 5, as an embodiment of the present application, a driving system 200 for a display panel is disclosed, which includes a receiving module 210, an adjusting module 220, a calculating module 230, a converting module 240, and a driving module 250; the receiving module 210 receives the first color signal, converts the first color signal into a first brightness normalization signal, and obtains a first hue saturation brightness space signal according to the first brightness normalization signal; the adjusting module 220 obtains a color saturation signal of the first color hue saturation luminance space signal, and adjusts a color saturation value of the color saturation signal to obtain a second color saturation signal, so as to obtain a second color hue saturation luminance space signal; the calculating module 230 reduces the minimum value in the first luminance normalization signal according to the second hue saturation luminance spatial signal to obtain a second luminance normalization signal; the conversion module 240 converts the second luminance normalization signal to obtain a second color signal; the driving module 250 drives the display panel 300 using the second color signal.
Correspondingly, fig. 6 is a flowchart of a driving method of a display panel according to the present application, and as shown in fig. 6, the present application discloses a driving method of a display panel, including the steps of:
s1: receiving a first color signal, converting the first color signal into a first brightness normalization signal, and converting the first brightness normalization signal to obtain a first Hue, color saturation and brightness (HSV, Hue, saturation, Value) space signal;
s2: acquiring a color saturation signal of the first color hue saturation brightness space signal, and adjusting the color saturation value of the color saturation signal to obtain a second color saturation signal so as to obtain a second color hue saturation brightness space signal;
s3: lowering the minimum value in the first brightness normalization signal according to the second hue saturation brightness space signal to obtain a second brightness normalization signal;
s4: converting the second brightness normalization signal to obtain a second color signal;
s5: the display panel is driven using the second color signal.
In the RGB color system, because of more mixed color components except the main tone, the color cast is more serious; the color mixing proportion is reduced by reducing the minimum value in the first brightness normalization signal, so that the aim of improving the color saturation is fulfilled; so can improve the purity of dominant hue, weaken display panel's colour cast problem, make display panel's color more gorgeous simultaneously, this scheme does not sacrifice display panel's aperture opening ratio, and the effectual condition of having avoided display panel's luminousness to reduce takes place. Specifically, taking red as an example, when the hue is close to a pure red hue, the color cast degradation of viewing angle viewing is obvious, the purpose of improving the color saturation of the dominant hue in the pure red hue can be realized by reducing the brightness normalization signal of the color with the minimum brightness normalization signal in the pure red hue, the mixed color of other colors (green and blue) in the hue taking red as the dominant hue is reduced, the large-viewing-angle light leakage color is close to the original hue, and the problems of front view and side view color cast are solved, wherein the first color signal can be a three-primary-color signal of red, green and blue. The specific second color signal may be a second rgb signal.
In addition, also taking red as an example, in a red solid tone, red is a dominant tone; the color saturation taking red as a main hue can be reduced by increasing the minimum brightness normalization signal in the brightness normalization signals of other colors in the red pure hue; the color mixing can be close to white neutral color, and the color deviation of the neutral color can be reduced mainly because the color is leaked, so that the color cannot be generated by mixing the light leakage colors of the three primary colors, namely the light leakage color of the front side view is the neutral color.
Fig. 7 is a graph of a change from a color saturation signal to a second color saturation signal, and as shown in fig. 7, the step S2 of obtaining the color saturation signal of the first color hue saturation luminance spatial signal, and adjusting the color saturation value of the color saturation signal to obtain the second color hue saturation luminance spatial signal includes: acquiring an adjusting coefficient according to the color tone of the first color tone saturation brightness space signal; adjusting the color saturation value of the color saturation signal s according to the adjustment coefficient to obtain a second color saturation signal s'; the adjustment coefficient satisfies the following formula:
S'＝a×S4+b×S3+c×S2+ dXS + e; wherein s is a color saturation signal and s' is a second color saturation signal; and a, b, c, d and e are constants. And driving the display panel according to the second color saturation signal s' obtained by calculation, so that the color of the display panel is more vivid, and the color cast problem is effectively improved.
As shown in fig. 8, the step of obtaining the adjustment coefficient according to the hue of the first hue saturation luminance space signal includes: dividing the hue H into m hue intervals; obtaining adjustment coefficients a (H) (m), b (H) (m), c (H) (m), d (H (m), e (H (m)) according to the hue interval; wherein, the more serious the color cast, the larger the adjustment coefficient; the color saturation signal S and a second color saturation signal S' (h (m), S) corresponding to the hue interval satisfy the 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 the adjustment constants of hue interval to saturation. After dividing hue (H) into a plurality of intervals, because different intervals, the colour cast degree is different, so adopt different adjustment to the colour saturation according to the interval of difference, can be so that the color vividness of display panel promotes when, the adjustment of colour cast is more even.
FIG. 9 is a graph illustrating a change in color difference between a current color saturation signal and a second color saturation signal in accordance with an embodiment of the present application; the color difference change map of fig. 9 may be in the case of a front view angle. Of course, a side view angle is also possible. FIG. 10 is a schematic diagram of a variation of color difference for different colors of a color saturation signal and a second color saturation signal in an embodiment of the application; when the color saturation is adjusted, the color difference changes as shown in fig. 10, and the problem of color difference is improved.
Referring to fig. 11, the hue (H) represents different hue colors by 0 ° to 360 ° according to CIE (Commission Internationale de L' Ec-lairage) HSV definition, in which 0 ° is defined as red, 120 ° as green, and 240 ° as blue. The step S1 of receiving the first color signal, converting the first color signal into a first luminance normalization signal, and converting the first luminance normalization signal to obtain a first hue saturation luminance spatial signal includes: inputting a first color signal into a gray scale digital signal; converting the data gray scale digital signals to obtain first brightness normalization signals r, g and b; wherein R ═ R (R/255) ^ γ R, G ^ γ G, B ^ B (B/255) ^ γ B, where γ R, γ G, γ B are gamma signals; the formula for converting the first luminance normalization signals r, g, b into the hue h and saturation signal s is as follows:
wherein max represents the maximum value of r/g/b, and min represents the minimum value of r/g/b. The color saturation value is related to the first luminance normalization signal, when the color saturation signal is improved, the corresponding first luminance normalization signal is also changed, and particularly, when the color saturation value is improved by reducing the minimum value of the first luminance normalization signal, color mixing components except for the dominant hue are correspondingly reduced, so that the first hue color saturation luminance spatial signal with higher color purity is obtained.
The step S3 of dimming the minimum value in the first luminance normalization signal according to the second hue saturation luminance spatial signal to obtain a second luminance normalization signal includes: the first luminance normalization signal includes: a first red luminance normalization signal r, a first green luminance normalization signal g and a first blue luminance normalization signal b; the second luminance normalization signal includes: a second red luminance normalization signal r ', a second green luminance normalization signal g ' and a second blue luminance normalization signal b '; acquiring a minimum value min in the first red brightness normalization signal r, the first green brightness normalization signal g and the first blue brightness normalization signal b according to the tone of the second tone color saturation brightness space signal; and according to the color saturation signal s and the second color saturation signal s ', reducing the minimum value min in the first red brightness normalization signal r, the first green brightness normalization signal g and the first blue brightness normalization signal b to obtain an adjusted minimum value min ' so as to obtain a second red brightness normalization signal r ', a second green brightness normalization signal g ' and a first blue brightness normalization signal b '.
The step of obtaining the minimum value of the first luminance normalization signal according to the hue of the second hue saturation luminance spatial signal comprises: when the dominant hue is red, max is r; determining the smaller value of the first brightness normalization signals g and b corresponding to the green and the blue as the minimum value of the first brightness normalization signals; when the dominant hue is green, max is g; determining the smaller value of the first brightness normalization signals r and g corresponding to the red and the blue as the minimum value of the first brightness normalization signals; when the dominant hue is blue, max is b; and determining the smaller value of the first brightness normalization signals r and g corresponding to the red and the green as the minimum value of the first brightness normalization signals. In detail, for example, when the dominant hue is blue, max in r, g and b can be determined as b, so that max does not need to be calculated additionally, and only the smaller value of r and g needs to be calculated as min, so that in the case of reducing the calculation amount, min is reduced to reduce the mixed color component, thereby reducing the color cast of the front view and the side view of the display panel; the G, R color component in the B hue exists, the light leakage amount of the G, R component at a large viewing angle is more obvious compared with the front viewing angle, and the color shift of the B main hue after color mixing is generated. According to the scheme, G, R color components are reduced, the influence of large-viewing-angle G, R light leakage on the main hue B is reduced, viewing-angle color cast is reduced, the color purity of the main hue B is improved, and the color vividness is improved; the other colors are the same.
By s' 1-min/max, the maximum first luminance normalization signal max is the first green luminance normalization signal g when green is the dominant tone, and the minimum first luminance normalization signal min is decreased while increasing the first green luminance normalization signal g. This adjustment can reduce the minimum first luminance normalization signal min by a small amount, thereby avoiding the possible normalized luminance imbalance when the minimum first luminance normalization signal min is reduced.
The step S4 of converting the second luminance normalization signal into a second color signal includes: converting the second brightness normalization signal into a second color signal according to the following calculation formula: r '255 × (R')1/γr、G’＝255×(g’)1/γg、B’＝255×(b’)1/γb(ii) a Wherein r ', g ' and b ' are second luminance normalization signals; r ', G ', B ' are second color signals. The second color signals R ', G' and B 'are reversely calculated according to the second brightness normalization signals R', G 'and B', so that the purpose of reducing the difference between the front-view color deviation and the side-view color deviation is achieved, the color deviation is effectively improved, and the color vividness of the display panel is improved.
The step of adjusting the color saturation value of the color saturation signal s according to the adjustment coefficient to obtain a second color saturation signal s' comprises: the color difference Δ uv of the color saturation signal and the second color saturation signal satisfies the following formula:
where u _1 and v _1 are the chromaticity coordinates of the color saturation signal and u _2 and v _2 are the chromaticity coordinates of the second color saturation signal. According to the calculation of the formula, the change range of the purity is determined, the problem that the saturation adjustment amplitude is too large to cause other problems is avoided, and the saturation adjustment amplitude is controlled within a controllable range while the color cast problem is effectively improved.
As can be seen from fig. 1, the color shift of the three primary color signals close to the pure green hue is significantly smaller than the color shifts of the red hue and the blue hue, so:
on the premise of the same color saturation value, when the dominant hue is green, the reduction degree of the minimum value in the first brightness normalization signals g and b corresponding to red and blue is larger; when the dominant hue is red or blue, if the minimum value min of the first luminance normalization signal corresponds to green, the minimum value of the first luminance normalization signal is reduced to a smaller extent.
It should be noted that, the limitations of each step in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all the steps should be considered as belonging to the protection scope of the present application.
The technical solution of the present application can be widely applied to various display panels, such as TN (Twisted Nematic) display panel, IPS (In-Plane Switching) display panel, VA (Vertical Alignment) display panel, MVA (Multi-Domain Vertical Alignment) display panel, and of course, other types of display panels, such as OLED (Organic Light-Emitting Diode) display panel, and the above solution can be applied thereto.
The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (9)
1. A method of driving a display panel, comprising the steps of:
receiving a first color signal, converting the first color signal into a first brightness normalization signal, and converting according to the first brightness normalization signal to obtain a first hue saturation brightness space signal;
acquiring a color saturation signal of the first color hue saturation brightness space signal, and adjusting the color saturation value of the color saturation signal to obtain a second color saturation signal so as to obtain a second color hue saturation brightness space signal;
lowering the minimum value in the first brightness normalization signal according to the second hue saturation brightness space signal to obtain a second brightness normalization signal;
converting the second brightness normalization signal to obtain a second color signal; and
driving the display panel using the second color signal;
the step of obtaining the color saturation signal of the first hue color saturation brightness spatial signal, and adjusting the color saturation value of the color saturation signal to obtain the second hue saturation signal so as to obtain the second hue color saturation brightness spatial signal comprises:
acquiring an adjusting coefficient according to the color tone of the first color tone saturation brightness space signal;
adjusting the color saturation value of the color saturation signal s according to the adjustment coefficient to obtain a second color saturation signal s';
the adjustment coefficient satisfies the following formula:
S'＝a×S4+b×S3+c×S2+d×S+e；
wherein s is a color saturation signal and s' is a second color saturation signal; and a, b, c, d and e are constants.
2. The method of claim 1, wherein the step of receiving a first color signal, converting the first color signal into a first luminance normalization signal, and converting the first color saturation luminance spatial signal according to the first luminance normalization signal comprises:
inputting a first color signal into a gray scale digital signal;
converting the gray scale digital signals to obtain first brightness normalization signals r, g and b;
wherein R ═ R (R/255) ^ γ R, G ^ γ G, B ^ B (B/255) ^ γ B, where γ R, γ G, γ B are gamma signals;
the formula for converting the first luminance normalization signals r, g, b into the hue h and saturation signal s is as follows:
wherein max represents the maximum value of r/g/b, and min represents the minimum value of r/g/b.
3. The method of claim 2, wherein the step of dimming the minimum value in the first luminance normalization signal according to the second hue saturation luminance spatial signal to obtain the second luminance normalization signal comprises:
the first luminance normalization signal includes: a first red luminance normalization signal r, a first green luminance normalization signal g and a first blue luminance normalization signal b; the second luminance normalization signal includes: a second red luminance normalization signal r ', a second green luminance normalization signal g ' and a second blue luminance normalization signal b ';
acquiring a minimum value min in the first red brightness normalization signal r, the first green brightness normalization signal g and the first blue brightness normalization signal b according to the tone of the second tone color saturation brightness space signal;
and according to the color saturation signal s and the second color saturation signal s ', reducing the minimum value min in the first red brightness normalization signal r, the first green brightness normalization signal g and the first blue brightness normalization signal b to obtain an adjusted minimum value min ' so as to obtain a second red brightness normalization signal r ', a first green brightness normalization signal g ' and a first blue brightness normalization signal b '.
4. A method for driving a display panel according to claim 3, wherein the step of obtaining the minimum value min of the first luminance normalized signal from the hue of the second hue saturation luminance space signal comprises:
when the dominant hue is red, max is r;
determining the smaller value of the first brightness normalization signals g and b corresponding to the green and the blue as the minimum value of the first brightness normalization signals;
when the dominant hue is green, max is g;
determining the smaller value of the first brightness normalization signals r and g corresponding to the red and the blue as the minimum value of the first brightness normalization signals;
when the dominant hue is blue, max is b;
and determining the smaller value of the first brightness normalization signals r and g corresponding to the red and the green as the minimum value of the first brightness normalization signals.
5. The method for driving a display panel according to claim 3,
the step of converting the second luminance normalization signal to obtain a second color signal comprises:
converting the second brightness normalization signal into a second color signal according to the following calculation formula:
R’＝255×(r’)1/γr、G’＝255×(g’)1/γg、B’＝255×(b’)1/γb；
wherein r ', g ' and b ' are second luminance normalization signals; r ', G ', B ' are second color signals.
6. The method for driving a display panel according to claim 1, wherein the step of adjusting the color saturation value of the color saturation signal s according to the adjustment coefficient to obtain the second color saturation signal s' comprises:
the color difference Δ uv of the color saturation signal and the second color saturation signal satisfies the following formula:
7. The method for driving a display panel according to claim 1, wherein the step of obtaining the adjustment coefficient based on the hue of the first hue saturation luminance space signal:
dividing the hue H into m hue intervals;
obtaining adjustment coefficients a (H) (m), b (H) (m), c (H) (m), d (H (m), e (H (m)) according to the hue interval;
wherein, the more serious the color cast, the larger the adjustment coefficient;
the color saturation signal s and a second color saturation signal corresponding to the hue interval
S' (H (m), S) satisfies the 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 the adjustment constants of hue interval to saturation.
8. A driving system of a display panel using the driving method of a display panel according to any one of claims 1 to 7, comprising:
the receiving module is used for receiving the first color signal, converting the first color signal into a first brightness normalization signal and converting the first brightness normalization signal into a first color hue saturation brightness space signal;
the adjusting module is used for acquiring a color saturation signal of the first color hue saturation brightness space signal, and adjusting the color saturation value of the color saturation signal to obtain a second color saturation signal so as to obtain a second color hue saturation brightness space signal;
the calculation module is used for reducing the minimum value in the first brightness normalization signal according to the second hue saturation brightness space signal to obtain a second brightness normalization signal;
the conversion module is used for obtaining a second color signal according to the second brightness normalization signal; and
and the driving module drives the display panel by using the second color signal.
9. A display device comprising a driving system of a display panel according to claim 8 and a display panel driven by the driving system.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910275101.2A CN110010087B (en) | 2019-04-08 | 2019-04-08 | Driving method and driving system of display panel and display device |
| PCT/CN2020/078415 WO2020207169A1 (en) | 2019-04-08 | 2020-03-09 | Driving method and driving system for display panel, and display device |
| US17/417,392 US11423854B2 (en) | 2019-04-08 | 2020-03-09 | Driving method and system of display panel, and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910275101.2A CN110010087B (en) | 2019-04-08 | 2019-04-08 | Driving method and driving system of display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110010087A CN110010087A (en) | 2019-07-12 |
| CN110010087B true CN110010087B (en) | 2022-04-19 |
Family
ID=67170318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910275101.2A Active CN110010087B (en) | 2019-04-08 | 2019-04-08 | Driving method and driving system of display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110010087B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020207169A1 (en) * | 2019-04-08 | 2020-10-15 | 重庆惠科金渝光电科技有限公司 | Driving method and driving system for display panel, and display device |
| CN113077742B (en) * | 2021-03-17 | 2023-02-07 | Tcl华星光电技术有限公司 | Adjusting method and adjusting device of display panel and display panel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780797A (en) * | 2014-01-23 | 2014-05-07 | 北京京东方光电科技有限公司 | Image color enhancement method and device |
| CN105069756A (en) * | 2015-08-10 | 2015-11-18 | 深圳市华星光电技术有限公司 | Image enhancing method |
| CN105528999A (en) * | 2016-01-15 | 2016-04-27 | 合一智能科技（深圳）有限公司 | Liquid crystal display screen display control method and device |
| CN108364620A (en) * | 2018-03-30 | 2018-08-03 | 惠科股份有限公司 | The driving method of liquid crystal display device |
| CN109559693A (en) * | 2018-12-11 | 2019-04-02 | 惠科股份有限公司 | A kind of driving method of display panel, drive system and display device |
-
2019
- 2019-04-08 CN CN201910275101.2A patent/CN110010087B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780797A (en) * | 2014-01-23 | 2014-05-07 | 北京京东方光电科技有限公司 | Image color enhancement method and device |
| CN105069756A (en) * | 2015-08-10 | 2015-11-18 | 深圳市华星光电技术有限公司 | Image enhancing method |
| CN105528999A (en) * | 2016-01-15 | 2016-04-27 | 合一智能科技（深圳）有限公司 | Liquid crystal display screen display control method and device |
| CN108364620A (en) * | 2018-03-30 | 2018-08-03 | 惠科股份有限公司 | The driving method of liquid crystal display device |
| CN109559693A (en) * | 2018-12-11 | 2019-04-02 | 惠科股份有限公司 | A kind of driving method of display panel, drive system and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110010087A (en) | 2019-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110189717B (en) | Driving method and driving system of display module and display device | |
| CN109559693B (en) | Driving method and driving system of display panel and display device | |
| CN109559692B (en) | Driving method and driving system of display module and display device | |
| US11475854B2 (en) | Driving method of display module, driving system thereof, and display device | |
| CN106531103B (en) | Driving method, device and the liquid crystal display of liquid crystal display | |
| CN110010087B (en) | Driving method and driving system of display panel and display device | |
| CN109461417B (en) | Driving method and driving system of display panel and display device | |
| CN109285513B (en) | Driving method and driving device of display panel | |
| CN109658872B (en) | Driving method and driving device of display module | |
| US11545096B2 (en) | Driving method of display module, driving system thereof, and driving device | |
| CN110111744B (en) | Driving method and driving system of display module and display device | |
| CN108231015A (en) | Driving method, driving device and the display device of display device | |
| US11423854B2 (en) | Driving method and system of display panel, and display device | |
| CN110136662B (en) | Driving method and driving system of display panel and display device | |
| US11138942B2 (en) | Driving method of display module, driving system thereof, and driving device | |
| CN109658884B (en) | Driving method and driving system of display panel and display device | |
| CN109637472B (en) | Driving method and driving system of display panel and display device | |
| CN106531102B (en) | Driving method, device and the liquid crystal display of liquid crystal display | |
| US11355078B2 (en) | Display panel driving method, driving system and display device | |
| CN109754768B (en) | Driving method and driving system of display panel | |
| CN109637471B (en) | Driving method and driving system of display panel and display device | |
| CN109859706B (en) | Driving method and driving system of display panel | |
| CN109599074B (en) | Driving method and driving system of display panel | |
| CN109887470B (en) | Driving method and driving system of display panel | |
| WO2020207168A1 (en) | Method and system for driving display module, and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |