WO2020118924A1 - 显示模组的驱动方法、驱动系统和驱动装置 - Google Patents

显示模组的驱动方法、驱动系统和驱动装置 Download PDF

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WO2020118924A1
WO2020118924A1 PCT/CN2019/077601 CN2019077601W WO2020118924A1 WO 2020118924 A1 WO2020118924 A1 WO 2020118924A1 CN 2019077601 W CN2019077601 W CN 2019077601W WO 2020118924 A1 WO2020118924 A1 WO 2020118924A1
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Prior art keywords
color
signal
light source
ave
color saturation
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English (en)
French (fr)
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康志聪
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HKC Co Ltd
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HKC Co Ltd
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Priority claimed from CN201811511896.4A external-priority patent/CN109461417B/zh
Priority claimed from CN201811510612.XA external-priority patent/CN109658872B/zh
Application filed by HKC Co Ltd filed Critical HKC Co Ltd
Priority to US16/982,049 priority Critical patent/US11545096B2/en
Publication of WO2020118924A1 publication Critical patent/WO2020118924A1/zh
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G09G2300/0447—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the technical field of display panels, in particular to a driving method, a driving system and a driving device for a display module.
  • liquid crystal display which include a liquid crystal panel and a backlight module (Backlight Module).
  • Backlight Module The working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates, and apply a driving voltage on the two glass substrates to control the rotation direction of the liquid crystal molecules, so as to refract the light of the backlight module to generate a picture.
  • VA Very Alignment
  • the present application provides a driving method, a driving system and a display device for a display module to adjust the light source intensity of the light source to improve insufficient color saturation and color deviation.
  • the present application provides a driving method for a display module, which includes a display panel driving process driven synchronously and a backlight module driving process:
  • the display module includes a plurality of independently controlled first color light sources and second color light sources;
  • the driving process of the display panel includes steps:
  • the driving process of the backlight module includes:
  • the adjustment coefficient adjusts the first brightness value corresponding to the first color light source and/or the second color light source to obtain a second brightness value; determines the main tone light source from the first color light source and the second color light source; uses the second brightness value pair The main tone light source is driven.
  • This application also discloses a drive system for a display module, including:
  • Synchronously driven display panel drive circuit and backlight module drive circuit Synchronously driven display panel drive circuit and backlight module drive circuit
  • the display module includes a plurality of independently controlled first color light sources and second color light sources;
  • the display panel driving circuit includes: a receiving circuit, a color saturation adjustment circuit, and a first driving circuit; the receiving circuit receives the first color signal under the RGB system corresponding to the display panel, and converts the first color signal into the HSV system The first color space signal; the color saturation adjustment circuit uses a preset adjustment coefficient to perform color saturation adjustment on the first color space signal to obtain a second color space signal under the HSV system; according to the second color space signal Converting to obtain the second color signal under the RGB system: the first driving circuit uses the second color signal to drive the display panel;
  • the backlight module drive circuit includes: a light source adjustment calculation circuit, a light source adjustment circuit, a main-tone light source calculation circuit and a second drive circuit; the light source adjustment calculation circuit receives the first color signal under the RGB system corresponding to the display panel and obtains Under the HSV system, the first color space signal and the second color space signal obtain the light source adjustment coefficients according to the first color space signal and the second color space signal; the light source adjustment circuit uses the light source adjustment coefficients for the first color light source and/or The first brightness value corresponding to the second color light source is adjusted to obtain a second brightness value; the main tone light source calculation circuit determines the main tone light source from the first color light source and the second color light source; the second driving circuit uses the second The brightness value drives the main tone light source.
  • the application also discloses a display device, including the above-mentioned display module driving system.
  • the first color signal is first converted into the HSV system Under the first color space signal, adjust the color saturation (usually lower the color saturation value), the second color space signal obtained in this way, and then re-converted to the second color signal to drive the display panel, so that the color deviation is obtained Very good improvement; however, due to the adjustment of the color saturation value, the color saturation of the image becomes worse; the second brightness value is to adjust the intensity of the light source while adjusting the color saturation. Return the color saturation signal with damaged color saturation from the unsaturated color point to the saturated hue. While reducing the color deviation, especially the large-vision role deviation, maintain the good presentation of the color saturation and achieve good color pure color performance;
  • the light source intensity adjustment is performed only on the main tone light source. This is because, in the color saturation adjustment stage, since the color deviation of the solid color tone is the most serious, when the color saturation adjustment is performed, the color saturation signal of the solid color tone is also mainly used , Or the signal corresponding to the main tone light source is adjusted, and in turn, the main tone light source is compensated to compensate for the loss of color saturation due to the improvement of color shift, to achieve the corresponding compensation effect, in improving the color shift At the same time, it is beneficial to improve the color saturation presentation, achieve the balance of color shift and color saturation, and improve the display effect of the display panel.
  • FIG. 1 is a schematic diagram showing the change of the character deviation of the large angle of view and frontal view of various representative color systems of a liquid crystal display
  • FIG. 2 is a first schematic diagram of dividing an original pixel into a primary and secondary pixel in an exemplary solution
  • FIG. 3 is a second schematic diagram of dividing an original pixel into a primary and secondary pixel in an exemplary solution
  • FIG. 4 is a flowchart of a driving process of a display panel according to an embodiment of the present application.
  • FIG. 5 is a flowchart of a driving process of a backlight module according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a direct-type display module according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a correlation function of a second preset adjustment coefficient H2 according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the color difference change of the current color saturation signal and the second color saturation signal of this application;
  • FIG. 11 is a schematic diagram of a driving system of a display panel according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a driving circuit of a display panel according to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a driving circuit of a backlight module according to an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a display device according to an embodiment of the present application.
  • VA Vertical Alignment
  • Figure 1 is a schematic diagram of the large angle of view and the frontal view of the deviation of the role of the front view of the various representative color systems of the liquid crystal display. Referring to FIG. 1, the ordinate indicates the degree of color shift. The partial situation is more serious than other color systems.
  • RGB Red, Green, Blue
  • FIG. 2 is a first comparison diagram that does not distinguish between primary and secondary pixels and distinguishes between primary and secondary pixels
  • FIG. 3 is a second comparison diagram that does not distinguish between primary and secondary pixels and distinguishes between primary and secondary pixels.
  • the The x-coordinate, y-coordinate and z-coordinate respectively represent the three directions of the three-dimensional space; the ⁇ A represents the pretilt angle at which the main pixel is under a large voltage, and the ⁇ B represents the pretilt angle at which the subpixel is under a small voltage.
  • the abscissa in FIG. 3 is a gray-scale signal, and the ordinate is a luminance signal.
  • the luminance quickly saturates with the signal, causing a large visual role deviation (FIG. 3, the arc segment on the left), and Distinguishing between primary and secondary pixels can improve this to some extent.
  • the original signal is divided into primary and secondary pixels of large voltage + small voltage. Face the large voltage plus small voltage to maintain the original face-to-face signal changes with brightness.
  • the side-view brightness seen by the large voltage changes with gray scale as shown in Figure 3. Part A, the side-view brightness seen with a small voltage changes with gray scale as shown in Part B in Figure 3. In this way, the brightness of the side-view synthesis changes with the gray scale like the arc on the left, which is closer to the right line.
  • FIG. 4 is a flowchart of a driving process of a display panel according to an embodiment of the present application
  • FIG. 5 is a flowchart of a driving process of a backlight module according to an embodiment of the present application
  • the embodiment of the present application discloses A driving method for a display module, including a display panel driving process driven synchronously and a backlight module driving process: the display module includes a plurality of independently controlled first color light sources and second color light sources;
  • the driving process of the display panel includes steps:
  • S11 Receive the first color signal under the RGB system corresponding to the display panel, and convert the first color signal into the first color space signal under the HSV system;
  • the backlight module driving process includes:
  • S21 Receive the first color signal under the RGB system corresponding to the display panel, and obtain the first color space signal and the second color space signal under the HSV system, and obtain the light source adjustment coefficient according to the first color space signal and the second color space signal;
  • S23 Determine the main color light source from the first color light source and the second color light source
  • the driving system using the driving method can be set at the front end and in the timing control chip of the display panel.
  • the timing control chip also stores a lookup table of preset adjustment coefficients related to the performance of the display panel corresponding to the driving system And other parameters.
  • the first color signal is first converted to the HSV system Under the first color space signal, adjust the color saturation (usually lower the color saturation value), the second color space signal obtained in this way, and then re-converted to the second color signal to drive the display panel, so that the color deviation is obtained Very good improvement; however, due to the adjustment of the color saturation value, the color saturation of the image becomes worse; the second brightness value is to adjust the intensity of the light source while adjusting the color saturation.
  • the color saturation signal with damaged color saturation from the unsaturated color point to the saturated hue While reducing the color deviation, especially the large-vision role deviation, maintain the good presentation of the color saturation and achieve good color pure color performance;
  • the light source intensity adjustment is only performed on the main tone light source. This is because, in the color saturation adjustment stage, since the color deviation of the solid color hue is the most serious, the color saturation signal of the solid color hue is also mainly used when adjusting the color saturation , Or the signal corresponding to the main tone light source is adjusted, and in turn, the main tone light source is compensated to compensate for the loss of color saturation due to the improvement of color shift, and the corresponding compensation effect is achieved. At the same time, it is beneficial to improve the color saturation presentation, achieve the balance of color shift and color saturation, and improve the display effect of the display panel.
  • the display module is a direct-lit backlight display module, and a direct-lit backlight display module It includes multiple backlight zones, each of which includes multiple independently controlled first color light sources and second color light sources; the backlight zone also includes multiple independently controlled third color light sources;
  • the steps to determine the main tone light source include:
  • the main color light source is determined from the first color light source, the second color light source, and the third color light source.
  • the backlight partition may include three independently controlled light sources as shown in FIG. 6, and may also be applicable to other architectures.
  • the display panel is a direct-lit backlight panel. This type of display panel better implements the technology to compensate for the lack of color saturation through the adjustment of light source intensity.
  • each backlight partition includes multiple independently controlled A color light source, a second color light source, and a third color light source, and the color saturation signal of the color space is related to each light source; according to the calculation, it is determined which light source intensity or light sources are added to supplement the color saturation Help and adjust accordingly to maintain good color and solid color performance while improving color cast.
  • the step of obtaining the light source adjustment coefficient according to the first color space signal and the second color space signal includes: obtaining the first color space signal and the second color space signal of all pixels in the current backlight partition corresponding to the current frame , Respectively calculating the first average color saturation signal corresponding to the first color space signal and the second average color saturation signal corresponding to the second color space signal;
  • the light source adjustment coefficient is calculated according to the first average color saturation signal and the second average color saturation signal.
  • the intensity of the light source is adjusted in units of one backlight partition, first through the first average color saturation signal Sn_ave corresponding to the first color space signal, and the second average color saturation signal S'corresponding to the second color space signal n_ave to measure the difference between the color saturation of the first color signal and the second color signal before and after the color saturation adjustment operation, and then calculate the light source adjustment coefficient based on the difference between the two to make the display panel While improving the color deviation, the backlight partition takes the backlight partition as a whole, and each backlight partition independently compensates the color saturation to maintain a good color pure color performance.
  • the calculation method of the light source adjustment coefficient may use the following method:
  • the first color signal is an RGB three primary color signal under the RGB system, and the first color signal includes a red sub-pixel signal, a green sub-pixel signal, and a blue sub-pixel signal;
  • the steps of obtaining the light source adjustment coefficient according to the first color signal and the second color signal include:
  • the first average color saturation signal Sn_ave 1-minn_ave/maxn_ave is calculated from the minimum average signal;
  • the calculation step of the first average color saturation signal Sn_ave includes:
  • R, G, B refers to the RGB three-color grayscale digital signal corresponding to the first color signal
  • rn_ave Average(rn_1, 1, rn_1,2,..., rn_i,j);
  • gn_ave Average(gn_1,1,gn_1,2,...,gn_i,j);
  • bn_ave Average(bn_1,1,bn_1,2,...,bn_i,j);
  • the calculation step of the second average color saturation signal S’n_ave includes:
  • the second average color saturation signal S’n_ave 1-min’n_ave/max’n_ave calculated from the maximum average signal and the minimum average signal;
  • R’, G’, B’ refers to the RGB three-color grayscale digital signal corresponding to the second color signal
  • r'n_ave Average(r'n_1,1, r'n_1,2,..., r'n_i,j)
  • g'n_ave Average(g'n_1,1,g'n_1,2,...,g 'n_i,j)
  • b'n_ave Average(b' n_1,1, b'n_1,2,..., b'n_i,j).
  • all R, G, B sub-pixels in the backlight partition are converted into a group of unit pixels from the RGB system to the HSV system, that is, according to the stimulus value signals Rn_i, j, Gn_i, j, Bn_i, j, after normalization
  • the first normalized luminance signal rn_i,j,gn_i,j,bn_i,j is obtained by the normalization operation, and the first color space signal is calculated based on the first normalized luminance signal; and then the color saturation signal of the first color space signal Perform adjustment processing, and then based on the adjusted second color space signal, and pass the second color space signal through the process of the second normalized luminance signal, and inversely convert to obtain the corresponding stimulation function r'n_i,j,g' n_i,j, b'n_i,j; and based on the original stimulation function rn_i,j, gn_i,j, bn_i,j, and the new stimulation value signal r
  • the final calculated light source adjustment coefficient will be based on each actual pixel Comparing the presentation conditions, the calculated light source adjustment coefficient y has high accuracy, which will make the color saturation compensation effect better, which is conducive to better compensation for the loss of color saturation while improving the color deviation.
  • the calculation of the light source adjustment coefficient may also be obtained by the following method.
  • the light source adjustment coefficient is calculated from the first average color saturation signal Sn_ave and the second average color saturation signal S'n_ave.
  • all the first color space signal and the second color space signal are obtained in the unit of a backlight partition, and the color saturation signals are captured, and all the color saturation signals are averaged to calculate the light source Adjust the coefficients so that the backlight partition of the display panel improves the color deviation while taking the backlight partition as a whole, and each backlight partition independently compensates the color saturation to maintain a good color pure color performance.
  • maxn_ave is the maximum average signal of the red subpixel average signal, green subpixel average signal and blue subpixel average signal of the first color signal of all pixels in the backlight partition corresponding to the current frame
  • minn_ave is the backlight frame corresponding to the current frame The smallest average signal among the average signal of the red sub-pixel, the average signal of the green sub-pixel, and the average signal of the blue sub-pixel of the first color signal of all pixels in the;
  • max'n_ave is the maximum average signal among the red sub-pixel average signal, green sub-pixel average signal and blue sub-pixel average signal of the first color signal of all pixels in the backlight frame corresponding to the current frame
  • min'n_ave is the current The frame corresponds to the smallest average signal among the red sub-pixel average signal, the green sub-pixel average signal and the blue sub-pixel average signal of the second color signals of all pixels in the backlight partition.
  • the step of adjusting the color saturation it is necessary to obtain a corresponding preset adjustment coefficient, and perform an adjustment process of adjusting the color saturation value to the current color saturation signal;
  • the steps of performing color saturation adjustment on the first color space signal using the preset adjustment coefficient to obtain the second color space signal under the HSV system include:
  • the preset adjustment coefficient is calculated based on the color saturation signal according to a preset calculation formula or obtained by searching through a preset adjustment coefficient lookup table based on the color saturation signal.
  • the color saturation threshold may be 0.5, and if the color saturation value of the current color saturation signal is greater than 0.5, it is determined that the color saturation threshold is satisfied; or it may be an interval, such as 0.5-1 (excluding 0.5 and 1), that is When the current color saturation is greater than 0.5 and less than 1, the color saturation adjustment is performed, and the current color saturation is equal to 0.5 or 1, the color saturation adjustment may not be performed. In this scheme, only part of the color saturation signal will be adjusted.
  • the part of the color saturation signal must not only meet the color saturation threshold, but also need to meet the hue interval; this is because the color saturation value and color deviation of different hue intervals
  • the corresponding relationship is different; the higher the color saturation value, the more severe the color shift; in addition, the closer to the main color, the more serious the color shift, for example, in the hue interval corresponding to the blue main color of the 240-degree hue, the same color is saturated
  • the degree value the degree of color shift is far beyond the unadjusted tone interval of the 300-degree hue; at this time, even if the color saturation signal of the 300-degree hue satisfies the color saturation threshold, the corresponding degree of color shift may also be very It is small and does not need to be improved; in the same way, the color saturation value is high, but if the hue interval is appropriate, the color shift of the corresponding color saturation signal may not be particularly serious and no color saturation adjustment is required; thus, only Adjusting the color saturation signal that satisfies the preset threshold and the color shift of the
  • the preset adjustment coefficient is used to reduce the color saturation value of the current color saturation signal S; the adjustment processing of the color saturation signal is completed and obtained according to the second color saturation signal S′.
  • the step of the second color space signal under the HSV system according to the current color saturation signal S and the second color saturation signal S', the third color saturation signal S" is calculated; the color saturation value adjustment is completed twice , Based on the third color saturation signal S", obtain the second color space signal under the HSV system;
  • the second color space signal it is converted into a second color signal under the RGB system to drive the display panel.
  • FIG. 7 is a schematic diagram of a correlation function of a second preset adjustment coefficient H2 according to an embodiment of the present application. Referring to FIG. 7, in conjunction with FIGS. 4 to 6, it can be seen that, specifically, the third color saturation signal S" conforms to the following formula:
  • the second preset adjustment coefficient H2 is an adjustment coefficient used to adjust the second color saturation signal to the third color saturation signal; under the RGB system, 0 degrees is defined as a pure red color hue, 120 The degree is a green solid color hue, 240 degrees is a blue solid color hue, the closer to the solid color hue, the more severe the color deviation (under the same color saturation value); based on the second preset adjustment coefficient H2, the closer to the solid color hue's color saturation The degree signal will get a larger second adjustment, while the color saturation signal far from the solid color tone will get a small amplitude second adjustment; thus, the saturation signal close to the solid color tone will achieve a better effect of improving color shift And for the saturation signal far away from the pure color hue, it can reduce the damage caused by improving color shift to the overall color saturation, so as to achieve the balance of color shift and color saturation, which is conducive to improving the display effect of the display panel.
  • the color saturation adjustment stage because the color deviation of the solid color hue is the most serious, the color
  • it is mainly to adjust the color saturation signal of the pure color hue, or the signal corresponding to the main tone light source.
  • the main tone light source is compensated to compensate for the color saturation.
  • the loss is achieved to achieve the corresponding compensation effect. While improving the color shift, it is helpful to improve the color saturation presentation, achieve the balance of color shift and color saturation, and improve the display effect of the display panel.
  • the step of adjusting the color saturation it is necessary to obtain a corresponding preset adjustment coefficient, and perform an adjustment process of adjusting the color saturation value to the current color saturation signal;
  • the steps of performing color saturation adjustment on the first color space signal using the preset adjustment coefficient to obtain the second color space signal under the HSV system include:
  • the preset adjustment coefficient is calculated based on the color saturation signal according to a preset calculation formula or obtained by searching through a preset adjustment coefficient lookup table based on the color saturation signal.
  • the higher the color saturation of the signal the more serious the color shift; thus, in some color saturation values, the color shift is very serious, and in some color saturation values, The color shift is not obvious, which belongs to the acceptable range; through the hue interval and the preset threshold, the excellent color saturation signal is screened.
  • the process of reducing the color saturation value can improve the color shift while avoiding the Signals that do not need to be adjusted for color shift are subjected to unnecessary processing such as reducing the color saturation value, which is conducive to improving the display effect of the display panel.
  • the adjustment coefficient lookup table may be a lookup table directly recording the preset adjustment coefficient, or a lookup table recording the coefficient of the preset calculation formula.
  • the second color space signal and the first color space signal may conform to the following formula:
  • S is the current color saturation signal corresponding to the first color space signal
  • S' is the color saturation signal corresponding to the second color space signal
  • the a, b, c, d, and e are constants
  • the a, b, c, d, e can be obtained through the preset formula coefficient look-up table according to the different color saturation value and hue interval.
  • the preset adjustment coefficient can be calculated according to a preset calculation formula.
  • the calculation formula is different, in general, it can be satisfied with a fourth-degree polynomial, where the constant coefficients a, b, c, d, e are based on
  • the color saturation value is different from the hue interval, and it can be obtained through a preset lookup table; of course, other calculation formulas are also applicable.
  • the preset adjustment coefficient is equal to the root number S;
  • the preset adjustment coefficient is equal to the cubic root S and other formulas.
  • the step of using the preset adjustment coefficient that is, the step of converting the first color signal into the first color space signal under the HSV system may include the following processes:
  • the color saturation signal S 1-mini,j/maxi,j, where the mini,j and maxi,j are variables, and the color saturation value can be adjusted by adjusting the two.
  • the main is to maintain maxi ,j does not change, by increasing mini,j, so as to achieve the purpose of lowering the color saturation value; after such adjustment, the color saturation signal, especially the color saturation signal whose color saturation value is too high will be reduced,
  • this solution is not based on sacrificing the transparent opening area, it can avoid the reduction of light transmittance and the increase of the production cost of the display panel; in addition, by increasing the mini, j , At the same time, it also improves the brightness of mini, j, thereby improving the overall brightness of the display panel while improving the color shift, so as to achieve a good display effect.
  • the step of using the preset adjustment coefficient to reduce the color saturation value of the current color saturation signal includes: acquiring the current color saturation signal of the first color space signal, and detecting whether the current color saturation signal meets the preset color saturation threshold , And whether they are in the adjusted hue interval, if both are satisfied, the corresponding preset adjustment coefficient is obtained based on the color saturation signal and the corresponding color saturation value and hue interval. In this scheme, only part of the color saturation signal will be adjusted.
  • the part of the color saturation signal must not only meet the color saturation threshold, but also need to meet the hue interval; this is because the color saturation value and color deviation of different hue intervals
  • the corresponding relationship is different; the higher the color saturation value, the more severe the color shift; in addition, the closer to the main color, the more serious the color shift, for example, in the hue interval corresponding to the blue main color of the 240-degree hue, the same color is saturated
  • the degree value the degree of color shift is far beyond the unadjusted tone interval of the 300-degree hue; at this time, even if the color saturation signal of the 300-degree hue satisfies the color saturation threshold, the corresponding degree of color shift may also be very It is small and does not need to be improved; in the same way, the color saturation value is high, but if the hue interval is appropriate, the color shift of the corresponding color saturation signal may not be particularly serious and no color saturation adjustment is required; thus, only Adjusting the color saturation signal that satisfies the preset threshold and the color shift of the
  • the color saturation signal may be divided into at least a first hue interval, a second hue interval, and a third hue interval according to different hue; in the step of obtaining a preset adjustment coefficient corresponding to the current color saturation signal:
  • the larger the color saturation value of the current color saturation signal the larger the adjustment range of the adjustment process.
  • this solution since the same color tone interval, especially in the same color tone, the higher the color saturation value of the color saturation signal, the more severe the corresponding color shift; therefore, this solution has a large adjustment range for signals with high color saturation, The adjustment range of the signal with low color saturation value is small; among them, the color saturation signal is generally adjusted to reduce the color saturation value to reduce the color saturation gap of each signal and avoid the color brought by too high color saturation At the same time, to avoid the color shift caused by the excessive difference in color saturation, to achieve a better effect of improving color shift.
  • the color saturation signal with a low color saturation value may also be adjusted up, so that different color saturation signals are more uniform, and the color deviation is also improved to a certain extent.
  • the adjustment amplitude here mainly refers to lowering the amplitude of the color saturation signal.
  • the larger the color saturation value, the corresponding preset adjustment coefficient may be smaller or larger, but the adjustment amplitude
  • the first tone interval, the second tone interval, and the third tone interval are respectively a red tone interval, a green tone interval, and a blue tone interval; current color saturation signals having the same color saturation value correspond to the blue hue
  • the adjustment range of the preset adjustment coefficient of the interval to the current color saturation signal is greater than the adjustment range of the preset adjustment coefficient of the corresponding red hue interval to the current color saturation signal; the preset adjustment corresponding to the red hue interval
  • the adjustment range of the coefficient to the current color saturation signal is greater than the adjustment range of the current adjustment signal to the current color saturation signal by the preset adjustment coefficient corresponding to the green hue interval.
  • the degree of color shift of the color saturation signals based on different hue intervals is different.
  • the adjustment coefficient may be smaller than the preset adjustment coefficient corresponding to the red hue interval, and the preset adjustment coefficient corresponding to the red hue interval may be smaller than the preset adjustment coefficient corresponding to the green hue interval. In this case, the smaller the preset adjustment coefficient, the greater the adjustment amplitude.
  • the preset adjustment coefficient corresponding to the blue tone interval is the largest and the adjustment range is the largest, and the preset adjustment coefficient corresponding to the green tone interval is the smallest and the adjustment range is the smallest ;
  • the lowering amplitude of the color saturation signal in the blue hue interval is the largest, and the lowering amplitude of the color saturation signal in the green hue interval is the smallest, which not only reduces the excessive band of color saturation value Color shift, and make the color saturation of the color saturation signal more uniform, to a certain extent, it is also helpful to improve the color shift, so as to achieve a good effect of improving color shift.
  • the color saturation signal is divided into a red hue interval, a green hue interval, a blue hue interval and a non-adjusted hue interval according to different hue intervals;
  • the range of the hue value Hue is: 0-360, corresponding to 0-360 degrees, where:
  • the hue interval whose hue value satisfies the following formula is the red hue interval: 0 ⁇ Hue ⁇ 40, or 320 ⁇ Hue ⁇ 360; the hue interval where the hue value satisfies the following formula is the green hue interval: 80 ⁇ Hue ⁇ 160; the hue value satisfies the following formula
  • the tonal interval is divided into blue tonal interval: 200 ⁇ Hue ⁇ 280; the tonal interval whose tone value satisfies the following formula is the non-adjusted tonal interval: 40 ⁇ Hue ⁇ 80, or 160 ⁇ Hue ⁇ 200, or 280 ⁇ Hue ⁇ 320.
  • 0 degrees is defined as a red hue, 120 degrees as a green hue, and 240 degrees as a blue hue.
  • the green hue is divided into the green hue interval and will be close to
  • the blue hue is divided into the blue hue interval, and the red hue is divided into the red hue interval; and the blue hue away from the red, green and blue hue is divided into the non-adjustment interval, so that it can correspond to the same color saturation value, and the color deviation is the most
  • the severe blue hue interval corresponds to setting the largest preset adjustment coefficient; the lighter green hue interval corresponds to setting a smaller preset adjustment coefficient; and for the non-adjustment interval where there is almost no color deviation, no adjustment or Set the preset adjustment coefficient to 1, so as to improve the
  • the preset adjustment coefficient is used to reduce the color saturation value of the current color saturation signal S; the adjustment processing of the color saturation signal is completed and obtained according to the second color saturation signal S′.
  • the step of the second color space signal under the HSV system according to the current color saturation signal S and the second color saturation signal S', the third color saturation signal S" is calculated; the color saturation value adjustment is completed twice , Based on the third color saturation signal S", obtain the second color space signal under the HSV system;
  • the second color space signal it is converted into a second color signal under the RGB system to drive the display panel.
  • FIG. 8 is a schematic diagram of changes in the current color saturation signal and the second color saturation signal according to an embodiment of the present application
  • FIG. 9 is a color difference curve of the current color saturation signal and the second color saturation signal in the embodiment of the present application
  • FIG. 10 is a schematic diagram of color difference changes of the current color saturation signal and the second color saturation signal according to an embodiment of the present application.
  • the chromatic aberration change chart of FIG. 9 may be in the case of a positive viewing angle. Of course, it can also be in the case of a side view.
  • the dotted line in FIG. 10 is the corresponding color difference change of the current color saturation signal under various color systems
  • the solid line is the corresponding color difference change of the second color saturation signal under various color systems.
  • the display's input signal RGB three primary color signals if the display is driven with 8-bit color resolution, the tone of the RGB three primary color input signal can be decomposed into 0,1,2...255 gray-scale drive signals.
  • This application converts RGB three primary color input signals into HSV color space signals, and adjusts the color saturation according to different hue and color saturation values in the HSV color space to achieve the effect of improving color shift.
  • the large viewing angles and frontal viewing of the various representative color systems of the liquid crystal display change, it can be clearly found that the color system of the R, G, and B hues is more serious than other color systems. Therefore, solving the color shift defects of the R, G, and B hues can greatly improve the overall color shift improvement of the large viewing angle.
  • the input signals of the RGB three primary colors are 8-bit grayscale digital signals of 0, 1,...255, and each grayscale signal corresponds to the 255 input
  • H is a tone signal, and r, g, and b normalized brightness signals are converted into hue h and saturation s signals.
  • H represents the color, from 0 degrees to 360 degrees represents different hue colors, where 0 degrees is defined as red, 120 degrees is green, and 240 degrees is blue.
  • R is the red grayscale digital signal
  • G is the green grayscale digital signal
  • B is the blue grayscale digital signal
  • min is the minimum value of r, g, b
  • max is the maximum value of r, g, b .
  • r, g, b normalize the conversion relationship between the luminance signal and the hue h and saturation signal s, satisfying the following formula:
  • a detection step can be added, for example, to convert the color saturation signal to a CIE Lu'v' color space signal (CIE, Commission Internationale L'Eclairage, International Lighting Commission), where L is the luminance coordinate, u'and v'are the chromaticity coordinate.
  • CIE Commission Internationale L'Eclairage, International Lighting Commission
  • L the luminance coordinate
  • the color saturation adjustment processes the current color saturation signal to reduce the color saturation value, but if it is to minimize the loss of color saturation, the pure color changes from the current color saturation signal S to the second
  • u_1 and v_1 are the chromaticity coordinates of the current color saturation signal
  • u_2 and v_2 are the chromaticity coordinates of the second color saturation signal, that is, the
  • FIG. 11 is a schematic diagram of a driving system for a display panel of the present application
  • FIG. 12 is a schematic diagram of a driving circuit of a display panel according to an embodiment of the present application
  • FIG. 13 is a schematic diagram of a driving circuit of a backlight module according to an embodiment of the present application
  • 11-13 with reference to FIGS. 1-10, it can be seen that the present application also discloses a driving system 100 for a display module.
  • the driving method using any of the above display modules includes:
  • the display module includes a plurality of independently controlled first color light sources 130 and second color light sources 140;
  • the display panel driving circuit 110 includes:
  • the receiving circuit 111 receives the first color signal under the RGB system corresponding to the display panel, and converts the first color signal into the first color space signal under the HSV system;
  • the color saturation adjustment circuit 112 performs color saturation adjustment on the first color space signal using a preset adjustment coefficient to obtain a second color space signal under the HSV system; and converts the second color space signal according to the second color space signal to obtain the second under the RGB system Color signal:
  • the first driving circuit 113 uses the second color signal to drive the display panel
  • the backlight module driving circuit 120 includes:
  • the light source adjustment calculation circuit 121 receives the first color signal under the RGB system corresponding to the display panel, and obtains the first color space signal and the second color space signal under the HSV system, according to the first color space signal and the second color space signal Light source adjustment factor;
  • the light source adjustment circuit 122 uses the light source adjustment coefficient to adjust the first brightness value corresponding to the first color light source and/or the second color light source to obtain a second brightness value;
  • the main tone light source calculation circuit 123 determines the main tone light source from the first color light source and the second color light source; and the second drive circuit 124 drives the main tone light source using the second brightness value.
  • FIG. 14 is a schematic diagram of a display device of the present application. Referring to FIG. 14 in conjunction with FIGS. 1 to 13, it can be seen that the present application also discloses a display device 200 including a driving system 100 of a display module as in the present application.
  • the technical solution of the present application can be widely used in various display panels, and can be applied.

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Abstract

一种显示模组的驱动方法、驱动系统（100）和显示装置（200），包括同步驱动的显示面板驱动过程，以及背光模组驱动过程；显示面板的驱动过程包括步骤：进行色饱和度调整，转换得到第二颜色信号以驱动显示面板；背光模组驱动过程包括使用光源调整系数对第一亮度值进行调整得到第二亮度值（S22）；确定主色调光源（S23）；使用第二亮度值对主色调光源进行驱动（S24）。

Description

显示模组的驱动方法、驱动系统和驱动装置
本申请要求于2018年12月11日提交中国专利局，申请号为CN201811510612.X，申请名称为“一种显示模组的驱动方法和驱动装置”以及于2018年12月11日提交中国专利局，申请号为CN201811511896.4，申请名称为“一种显示面板的驱动方法、驱动系统和显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示面板技术领域，尤其涉及一种显示模组的驱动方法、驱动系统和驱动装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
随着科技的发展和进步，液晶显示器由于具备机身薄、省电和辐射低等热点而成为显示器的主流产品，得到了广泛应用。现有市场上的液晶显示器大部分为背光型液晶显示器，其包括液晶面板及背光模组(Backlight Module)。液晶面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，并在两片玻璃基板上施加驱动电压来控制液晶分子的旋转方向，以将背光模组的光线折射出来产生画面。
大尺寸液晶显示面板，特别是VA(Vertical Alignment，垂直配向技术)型液晶显示面板，色偏严重。
发明内容
本申请提供一种显示模组的驱动方法、驱动系统和显示装置以对光源的光源强度来进行调整改善色饱和度不足和色偏。
为实现上述目的，本申请提供了一种显示模组的驱动方法，包括同步驱动的显示面板驱动过程，以及背光模组驱动过程：
所述显示模组包括多个独立控制的第一颜色光源和第二颜色光源；
所述显示面板的驱动过程包括步骤：
接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号；根据第二色彩空间信号转 换得到RGB体系下的第二颜色信号：使用第二颜色信号驱动显示面板；
所述背光模组驱动过程包括：
接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；从第一颜色光源和第二颜色光源中确定主色调光源；使用第二亮度值对主色调光源进行驱动。
本申请还公开了一种显示模组的驱动系统，包括：
同步驱动的显示面板驱动电路，以及背光模组驱动电路；
所述显示模组包括多个独立控制的第一颜色光源和第二颜色光源；
所述显示面板驱动电路包括：接收电路、色饱和度调整电路和第一驱动电路；所述接收电路接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；所述色饱和度调整电路使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号；根据第二色彩空间信号转换得到RGB体系下的第二颜色信号：所述第一驱动电路使用第二颜色信号驱动显示面板；
所述背光模组驱动电路包括：光源调整计算电路、光源调整电路、主色调光源计算电路和第二驱动电路；所述光源调整计算电路接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；所述光源调整电路使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；所述主色调光源计算电路从第一颜色光源和第二颜色光源中确定主色调光源；所述第二驱动电路使用第二亮度值对主色调光源进行驱动。
本申请还公开了一种显示装置，包括上述的一种显示模组的驱动系统。
本申请中，在一种申请人知晓且未公开的技术中，由于RGB体系，不同的色调和不同的色饱和度值下，色偏不同，因而，先将第一颜色信号，转换为HSV体系下的第一色彩空间信号，进行色饱和度调整(一般是调低色饱和度值)，这样得到的第二色彩空间信号，再重新转换为第二颜色信号以驱动显示面板，这样色偏得到很好的改善；但是，由于对色饱和度值进行了调整，因而图像的色饱和度体现变差；该第二亮度值，则是在色饱和度调整的同时，调节光源的强度，从旁将色饱和度受到损伤的色饱和度信号从不饱和色点重新返回到饱和色调，在降低色偏特别是大视角色偏的同时，维持色饱和度的良好呈现，达到良好的色彩纯色表现；
而仅对主色调光源进行光源强度调整，这是因为，在色饱和度调整阶段，由于纯色色调的色偏最严重，在进行色饱和度调整时，也主要是对纯色色调的色饱和度信号，或者说主色调光源对应的信号进行了调整，此时反过来，对主色调光源进行补偿以对应补偿色饱和度由于改善色偏而受到的损失，达到对应的补偿效果，在改善色偏的同时，有利于改善色饱和度呈现，达到色偏和色饱和度的平衡，提升显示面板的显示效果。
附图说明
图1是液晶显示器各种代表性色系的大视角与正视视角色偏变化示意图；
图2是示例性方案中，将原像素划分为主次像素的第一示意图；
图3是示例性方案中，将原像素划分为主次像素的第二示意图；
图4是本申请实施例一种显示面板的驱动过程流程图；
图5是本申请实施例一种背光模组的驱动过程流程图；
图6是本申请实施例直下式显示模组的示意图；
图7是本申请实施例第二预设调整系数H2的相关函数示意图；
图8是本申请实施例当前色饱和度信号和第二色饱和度信号的变化示意图；
图9是本申请的当前色饱和度信号和第二色饱和度信号的色差变化曲线图；
图10是本申请的当前色饱和度信号和第二色饱和度信号的色差变化示意图；
图11是本申请实施例一种显示面板的驱动系统示意图；
图12是本申请实施例一种显示面板的驱动电路示意图；
图13是本申请实施例一种背光模组的驱动电路示意图；
图14是本申请实施例一种显示装置的示意图。
具体实施方式
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用于描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。
大尺寸液晶显示面板，特别是VA(Vertical Alignment，垂直配向技术)型液晶显示面板，对应的大视角亮度随电压快速饱和，造成视角画质对比及色偏相较于正视画质品质恶化严重。
图1是液晶显示器各种代表性色系的大视角与正视视角色偏变化示意图，参考图1，纵坐标表示色偏程度，可以明显发现，偏R、G、B色相的色系大视角色偏情况均较其他色系来得严重。
示范性的解决方案是通过将将RGB(Red、Green、Blue)各子像素再划分为主/次像素(Main/Sub)，使得整体大视角亮度随电压变化接近正视。
图2是不区分主次像素和区别主次像素的第一对比示意图，图3是是不区分主次像素和区别主次像素的第二对比示意图，参考图2和图3可知，其中，该x坐标，y坐标和z坐标，分别代表三维空间的三个方向；该θA表示其中主像素大电压下的预倾导角，该θB表示其中次像素小电压下的预倾导角。其中，该图3中的横坐标为灰阶信号，而纵坐标为亮度信号，在大视角下，亮度随信号快速饱和，造成大视角色偏(图3，左侧的弧线段)，而区分主次像素可以在一定程度上改善这一。具体的，将原信号分成大电压+小电压的主次像素，正视大电压加上小电压要维持原正视信号随亮度变化,大电压看到的侧视亮度随灰阶变化如图3中的Part A，小电压看到的侧视亮度随灰阶变化如图3中的Part B。这样侧视合成看起来的亮度随灰阶变化就如左侧弧线，较为贴近右侧直线正视亮度随 灰阶变化的关系,所以视角亮度随信号变化关系接近正视原信号亮度随信号变化,使得视角获得改善。这种藉由空间上主次像素给予不同的驱动电压来解决视角色偏的缺陷，这样的像素(pixel)设计往往需要再设计金属走线或薄膜晶体管(Thin Film Transistor，TFT)元件来驱动次像素，造成可透光开口区牺牲，影响面板穿透率，直接造成背光成本的提升。
因而，本申请基于不同的技术构思，改进得到如下的方案：
下面结合附图和实施例对本申请作进一步说明。
图4是本申请实施例一种显示面板的驱动过程流程图；图5是本申请实施例一种背光模组的驱动过程流程图；如图4和图5所示，本申请实施例公布了一种显示模组的驱动方法，包括同步驱动的显示面板驱动过程，以及背光模组驱动过程：所述显示模组包括多个独立控制的第一颜色光源和第二颜色光源；
所述显示面板的驱动过程包括步骤：
S11:接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；
S12:使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV(Hue,Saturation,Value)体系下的第二色彩空间信号；根据第二色彩空间信号转换得到RGB体系下的第二颜色信号：
S13:使用第二颜色信号驱动显示面板；
背光模组驱动过程包括：
S21:接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；
S22:使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；
S23:从第一颜色光源和第二颜色光源中确定主色调光源；
S24:使用第二亮度值对主色调光源进行驱动。
其中，使用该驱动方法的驱动系统，可以设置在前端，设置在显示面板的时序控制芯片内，时序控制芯片内还存储有与该驱动系统对应的显示面板的性能相关的预设调整系数查找表等参数。本申请中，在一种发明人知晓且未公开的技术中，由于RGB体系，不同的色调和不同的色饱和度值下，色偏不同，因而，先将第一颜色信号，转换为HSV体系下的第一色彩空间信号，进行色饱和度调整(一般是调低色饱和度值)，这样得到的第二色彩空间信号，再重新转换为第二颜色信号以驱动显示面板，这样色偏得到很好的改善；但是，由于对色饱和度值进行了调整，因而图像的色饱和度体现变差；该第二亮度值，则是在色饱和度调整的同时，调节光源的强度，从旁将色饱和度受到损伤的色饱和度信号从不饱和色点重新返回到饱和色调，在降低色偏特别是大视角色偏的同时，维持色饱和度的良好呈现，达到良好的色彩纯色表现；而仅对主色调光源进行光源强度调整，这是因为，在色饱和度调整阶段，由于纯色色调的色偏最严重，在进行色饱和度调整时，也主要是对纯色色调的色饱和度信号，或者说主色调光源对应的信号进行了调整，此时反过来，对主色调光源进行补偿以对应补偿色饱和度由于改善色偏而受到的损失，达到对应的补偿效果，在改善色偏的同时，有利于改善色饱和度呈 现，达到色偏和色饱和度的平衡，提升显示面板的显示效果。
图6是一种直下式背光显示模组的示意图，参考图6，结合图4和图5可知，在一实施例中，该显示模组为直下式背光显示模组，直下式背光显示模组包括多个背光分区，每个背光分区分别包括多个独立控制的第一颜色光源和第二颜色光源；背光分区还包括多个独立控制的第三颜色光源；
确定主色调光源的步骤包括：
从第一颜色光源、第二颜色光源和第三颜色光源中确定主色调光源。
其中，该背光分区可以如图6所示包括三种独立控制的光源，也可以适用于其他架构。本方案中，该显示面板为直下式背光面板，该种类型的显示面板更好的实现通过光源强度调节来弥补色饱和度缺失的技术，具体的，每个背光分区包括多个独立控制的第一颜色光源、第二颜色光源和第三颜色光源，而色彩空间的色饱和度信号与各个光源都有关系；根据计算来确定，增加哪个或哪几个光源的光源强度对补充色饱和度有帮助，并对应进行调整，在改善色偏的同时，维持良好的色彩纯色表现。
在一实施例中，该根据第一色彩空间信号和第二色彩空间信号得到光源调整系数的步骤包括：获取当前帧对应当前背光分区内的所有像素的第一色彩空间信号和第二色彩空间信号，分别计算第一色彩空间信号对应的第一平均色饱和度信号，以及第二色彩空间信号对应的第二平均色饱和度信号；
根据第一平均色饱和度信号和第二平均色饱和度信号计算得到光源调整系数。本方案中，光源强度的调整以一个背光分区为单位，先通过第一色彩空间信号对应的第一平均色饱和度信号Sn_ave，和第二色彩空间信号对应的第二平均色饱和度信号S’n_ave来衡量色饱和度调整操作之前和色饱和度调整操作之后，第一颜色信号和第二颜色信号的色饱和度呈现之间的差异，再基于两者的差异计算光源调整系数，使得显示面板的背光分区在改善色偏的同时，以背光分区为整体，每个背光分区分别独立补偿色饱和度，来维持良好的色彩纯色表现。
在一实施例中，该光源调整系数的计算可以采用如下的方法：
该第一颜色信号是RGB体系下的RGB三原色信号，第一颜色信号包括红色子像素信号、绿色子像素信号和蓝色子像素信号；
根据第一颜色信号和第二颜色信号得到光源调整系数的步骤包括：
获取当前帧对应当前背光分区内的所有像素第一颜色信号，计算对应的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最大平均信号maxn_ave和minn_ave；根据最大平均信号和最小平均信号计算的得到第一平均色饱和度信号Sn_ave＝1-minn_ave/maxn_ave；
计算第二颜色信号的最大平均信号max’n_ave及最小平均信号min’n_ave；
根据最大平均信号和最小平均信号计算的得到第二平均色饱和度信号S’n_ave＝1-min’n_ave/max’n_ave；根据第一平均色饱和度信号和第二平均色饱和度信号计算光源调整系数y，使得光源调整系数y满足如下公式：
Sn_ave＝1-minn_ave/maxn_ave＝1-min’n_ave/(max’n_ave*y)即，y＝(min’n_ave*maxn_ave)/(minn_ave*max’n_ave)。本方案中，省去了各个像素的饱和度计算，只是各个背光分区的r,g,b颜色信号取平均再计算整个背光分 区的平均色饱和度信号，有利于减少计算复杂度；具体的，计算第一颜色信号对应的所有像素的最大平均信号maxn_ave和最小平均信号minn_ave，以及第二颜色信号所有像素对应的最大平均信号max’n_ave及最小平均信号min’n_ave，再根据公式S＝1-min/max来计算第一平均色饱和度信号和第二平均色饱和度信号，如此，基于第一平均色饱和度信号和第二平均色饱和度信号计算光源调整系数；其中，该光源调整系数将在光源强度调整的步骤中用于调整max’n_ave的值，以使得调整之后的第三色饱和度平均信号等于第一色饱和度平均信号，通过该光源调整系数调整光源强度，在改善色偏的同时，减少色饱和度呈现的损伤。
具体的，该第一平均色饱和度信号Sn_ave的计算步骤包括：
获取第一颜色信号Rn_i,j、Gn_i,j、Bn_i,j，并将每一组RGB三原色子像素灰阶信号转换成三原色归一化亮度信号r、g、b；完成转换得到第一归一化亮度信号rn_i,j、gn_i,j、bn_i,j；
计算当前帧对应当前背光分区内的所有像素的红色子像素平均信号rn_ave、绿色子像素平均信号gn_ave和蓝色子像素平均信号bn_ave；
计算三种子像素的最大平均信号maxn_ave和最小平均信号minn_ave；
根据最大平均信号和最小平均信号计算的达到第一平均色饱和度信号Sn_ave＝1-minn_ave/maxn_ave；其中，r＝(R/255)^γr、g＝(G/255)^γg、b＝(B/255)^γb，其中γr、γg、γb为第一颜色信号的伽马信号；
其中，R,G,B指的是第一颜色信号对应的RGB三原色灰阶数位信号；
其中，maxn_ave＝Max(rn_ave、gn_ave、bn_ave)及最小平均信号minn_ave＝Min(rn_ave、gn_ave、bn_ave)；其中，rn_ave＝Average(rn_1,1、rn_1,2、…、rn_i,j)；gn_ave＝Average(gn_1,1、gn_1,2、…、gn_i,j)；bn_ave＝Average(bn_1,1、bn_1,2、…、bn_i,j)；
而对应的，该第二平均色饱和度信号S’n_ave的计算步骤包括：
获取第二颜色信号R’n_i,j、G’n_i,j、B’n_i,j，并将每一组RGB三原色子像素灰阶信号转换成三原色归一化亮度r’、g’、b’，完成转换得到第二归一化亮度信号r’n_i,j、g’n_i,j、b’n_i,j；
计算当前帧对应当前背光分区内的所有像素的红色子像素平均信号r’n_ave、绿色子像素平均信号g’n_ave和蓝色子像素平均信号b’n_ave；
计算三种子像素的最大平均信号max’n_ave＝Max(r’n_ave、g’n_ave、bn_ave)及最小平均信号min’n_ave＝Min(r’n_ave、g’n_ave、b’n_ave)；
根据最大平均信号和最小平均信号计算的达到第二平均色饱和度信号S’n_ave＝1-min’n_ave/max’n_ave；
其中，r’＝(R’/255)^γr、g’＝(G’/255)^γg、b’＝(B’/255)^γb，其中γ’r、γ’g、γ’b为第二颜色信号的伽马信号；
其中，R’,G’,B’指的是第二颜色信号对应的RGB三原色灰阶数位信号；
其中，max’n_ave＝Max(r’n_ave、g’n_ave、b’n_ave)及最小平均信号min’n_ave＝Min(r’n_ave、g’n_ave、b’n_ave)；
其中，r’n_ave＝Average(r’n_1,1、r’n_1,2、…、r’n_i,j)，g’n_ave＝Average(g’n_1,1、g’n_1,2、…、g’n_i,j)，b’n_ave＝Average(b’ n_1,1、b’n_1,2、…、b’n_i,j)。本方案中，该背光分区内的所有R,G,B子像素为一组单位像素由RGB体系换算成HSV体系，即根据刺激值信号Rn_i,j、Gn_i,j、Bn_i,j，经过归一化操作得到第一归一化亮度信号rn_i,j、gn_i,j、bn_i,j，并基于第一归一化亮度信号推算第一色彩空间信号；然后对第一色空间信号的色饱和度信号进行调整处理，然后基于调整之后的第二色彩空间信号，并且将第二色彩空间信号经过第二归一化亮度信号的过程，并反推换算得到对应的刺激函数r’n_i,j、g’n_i,j、b’n_i,j；并基于原来的刺激函数rn_i,j、gn_i,j、bn_i,j，以及新的刺激值信号r’n_i,j、g’n_i,j、b’n_i,j计算第一平均色饱和度信号和第二平均色饱和度信号，由于计算过程中，实际推算出各单位像素的亮度刺激值，因而最终计算得到的光源调整系数将是基于每个实际像素的呈现情况进行比较计算得到的，因而计算得到的光源调整系数y准确性高，将使得色饱和度的补偿效果更佳，有利于在改善色偏的同时，更好的补偿色饱和度的损失。
在一实施例中，该光源调整系数的计算，还可以是通过如下的方法得到的，具体的，该光源调整系数的计算包括如下步骤：使用公式Sn_ave＝Average(Sn_1,1、Sn_1,2、…、Sn_i,j)，计算第一色彩空间信号对应的第一平均色饱和度信号；使用公式S’n_ave＝Average(S’n_1,1、S’n_1,2、…、S’n_i,j)计算第二色彩空间信号对应的第二平均色饱和度信号；
根据第一平均色饱和度信号Sn_ave和第二平均色饱和度信号S’n_ave计算得到光源调整系数。本方案中，以一个背光分区为单位，获取所有的第一色彩空间信号和第二色彩空间信号，并抓取其中的色饱和度信号，将所有的色饱和度信号取平均，用以计算光源调整系数，使得显示面板的背光分区在改善色偏的同时，以背光分区为整体，每个背光分区分别独立补偿色饱和度，来维持良好的色彩纯色表现。
具体的，该根据第一平均色饱和度信号和第二平均色饱和度信号计算光源调整系数的步骤包括：计算第一平均色饱和度信号Sn_ave＝1-minn_ave/maxn_ave；以及第二平均色饱和度信号S’n_ave＝1-min’n_ave/max’n_ave；
使用光源调整系数对第二平均色饱和度信号得到第三平均色饱和度信号S”n_ave；其中max’n_ave＝maxn_ave，且光源调整系数y满足如下公式：S”n_ave＝Sn_ave，即：
1-minn_ave/maxn_ave＝1-min’n_ave/(max’n_ave*y)，因而，y＝(S’n_ave-1)/(Sn_ave-1)；
其中，maxn_ave是当前帧对应背光分区内的所有像素的第一颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最大平均信号；minn_ave是当前帧对应背光分区内的所有像素的第一颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最小平均信号；
其中，max’n_ave是当前帧对应背光分区内的所有像素的第一颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最大平均信号；min’n_ave是当前帧对应背光分区内的所有像素的第二颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最小平均信号。
本方案中，该第二颜色信号的最大平均信号与第一颜色信号的最大平均信号 是一致，这是因为，在色饱和度调整时，保持每个像素的maxi,j不变，而调整mini,j，因而，最终得到的maxn_ave不变；其中，上述的Sn_ave＝1-minn_ave/maxn_ave，以及S’n_ave＝1-min’n_ave/maxn_ave并不需要实际的去计算minn_ave、maxn_ave和min’n_ave，而是可以通过色饱和度信号推算得到，将这些推算得到的数值，用于辅助计算，最终得到光源调整系数y＝(S’n_ave-1)/(Sn_ave-1)，根据公式Sn_ave＝Average(Sn_1,1、Sn_1,2、…、Sn_i,j)，以及公式S’n_ave＝Average(S’n_1,1、S’n_1,2、…、S’n_i,j)，即可计算得到光源调整系数；并且该光源调整系数，是基于背光分区的整体色饱和度差异来计算得到的，可以保证背光分区的色饱和度得到很好的补偿。
在一实施例中，在色饱和度调整的步骤中，需要获取对应的预设调整系数，对当前色饱和度信号进行调低色饱和度值的调整处理；
使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号的步骤包括：
获取第一色彩空间信号的当前色饱和度信号，检测当前色饱和度信号是否满足预设色饱和度阈值，以及是否位于调整色调区间，若均满足，则基于色饱和度信号、根据对应的色饱和度值和色调区间获取对应的预设调整系数；
使用预设调整系数对当前色饱和度信号进行调整，得到HSV体系下的第二色彩空间信号；
预设调整系数是基于色饱和度信号根据预设的计算公式计算得到或基于色饱和度信号通过预设调整系数查找表查找得到的。
其中，该色饱和度阈值可以为0.5，当前色饱和度信号的色饱和度值大于0.5的则判定满足色饱和度阈值；或者可以是区间，例如0.5-1(不包括0.5和1)，即当当前色饱和度大于0.5小于1时，进行色饱和度调整，而当前色饱和度等于0.5或1，可以不进行色饱和度调整。本方案中，仅部分色饱和度信号会进行调整操作，该部分的色饱和度信号不仅要满足色饱和度阈值，而且，需要满足色调区间；这是因为不同色调区间色饱和度值和色偏的对应关系是不同的；色饱和度值越高，色偏越严重；另外，越靠近主色调，色偏越严重，例如，在240度色调的蓝色主色调对应的色调区间，同一色饱和度值情况下，其色偏程度远远超过300度色调的非调整色调区间；此时，该300度色调的色饱和度信号即便满足色饱和度阈值，但是对应的色偏程度也可能是很小而不需要进行改善的；同理，色饱和度值高，但是色调区间合适的话，对应的色饱和度信号的色偏可能并不会特别严重而不需要进行色饱和度调整；如此，仅对满足预设阈值和色调区间的色偏的色饱和度信号进行调整处理，例如降低色饱和度值的处理，可以在改善色偏的同时，而且可以避免对不需要进行色偏调整的信号进行不必要的如降低色饱和度值等处理，有利于提高显示面板的显示效果。
本实施可选的，该使用预设调整系数对当前色饱和度信号S进行色饱和度值调低处理；完成色饱和度信号的调整处理，得到并根据第二色饱和度信号S’转换得到在HSV体系下的第二色彩空间信号的步骤中：根据当前色饱和度信号S和第二色饱和度信号S’，计算得到第三色饱和度信号S”；完成两次色饱和度值调整，基于第三色饱和度信号S”，得到在HSV体系下的第二色彩空间信号；
根据第二色彩空间信号转换为RGB体系下的第二颜色信号以驱动显示面板。
图7是本申请实施例第二预设调整系数H2的相关函数示意图，参考图7，结合图4至图6可知，具体的，第三色饱和度信号S”符合如下公式：
S”＝S-(S-S’)*H2；第二预设调整系数H2满足如下公式：H2＝2*ABS(sin((Hue/360*3-1/2)*π)-1。
本方案中，其中，第二预设调整系数H2是用于将第二色饱和度信号调整为第三色饱和度信号所用的调整系数；在RGB体系下，定义0度为红色纯色色调，120度为绿色纯色色调，240度为蓝色纯色色调，越靠近纯色色调，则色偏越严重(同一色饱和度值下)；基于该第二预设调整系数H2，越靠近纯色色调的色饱和度信号将得到更大幅度的二次调整，而远离纯色色调的色饱和度信号，则得到小幅度的二次调整；如此，对于靠近纯色色调的饱和度信号达到更好的改善色偏的效果，而对于远离纯色色调的饱和度信号则达到减少改善色偏对整体色饱和度呈现的损伤，以达到色偏和色饱和度的平衡，有利于提升显示面板的显示效果。从第一颜色光源、第二颜色光源和第三颜色光源中确定主色调光源的步骤包括：获取第二色饱和度信号的最大平均信号max’n_ave＝Max(r’n_ave、g’n_ave、b’n_ave)；将最大平均信号对应的颜色光源作为主色调光源。本方案中，基于最大平均信号，查找对应到主色调光源，而仅对主色调光源进行光源强度调整，这是因为，在色饱和度调整阶段，由于纯色色调的色偏最严重，在进行色饱和度调整时，也主要是对纯色色调的色饱和度信号，或者说主色调光源对应的信号进行了调整，此时反过来，对主色调光源进行补偿以对应补偿色饱和度由于改善色偏而受到的损失，达到对应的补偿效果，在改善色偏的同时，有利于改善色饱和度呈现，达到色偏和色饱和度的平衡，提升显示面板的显示效果。
在一实施例中，在色饱和度调整的步骤中，需要获取对应的预设调整系数，对当前色饱和度信号进行调低色饱和度值的调整处理；
使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号的步骤包括：
获取第一色彩空间信号的当前色饱和度信号，检测当前色饱和度信号是否满足预设色饱和度阈值，以及是否位于调整色调区间，若均满足，则基于色饱和度信号、根据对应的色饱和度值和色调区间获取对应的预设调整系数；
使用预设调整系数对当前色饱和度信号进行调整，得到HSV体系下的第二色彩空间信号；
预设调整系数是基于色饱和度信号根据预设的计算公式计算得到或基于色饱和度信号通过预设调整系数查找表查找得到的。本方案中，在RGB色系下，信号的色饱和度越高，色偏越严重；如此，在某些色饱和度值情况下，色偏很严重，而某些色饱和度值情况下，色偏不明显，属于可以接受的范围；通过色调区间和预设阈值，筛选出色偏严重的色饱和度信号，例如降低色饱和度值的处理，可以在改善色偏的同时，而且可以避免对不需要进行色偏调整的信号进行不必要的如降低色饱和度值等处理，有利于提高显示面板的显示效果。
其中，该调整系数查找表可以是直接记载有预设调整系数的查找表，也可以是记录预设的计算公式的系数的查找表。
其中，第二色彩空间信号和第一色彩空间信号可以符合如下公式：
S’＝a*S4+b*S3+c*S2+d*S+e；
其中，S为第一色彩空间信号对应的当前色饱和度信号，S’为第二色彩空间信号对应的色饱和度信号；所述a,b,c,d,e为常数，所述a,b,c,d,e根据色饱和度值和色调区间不同，通过预设的公式系数查找表查找得到。本方案中，该预设调整系数可以根据预设的计算公式计算得到，计算公式虽然不同，但是一般来说可以满足于四次多项式，其中的常系数a,b,c,d,e是根据色饱和度值和色调区间不同，通过预设的查找表查找得到；当然，其他的计算公式也是适用的，例如，当色饱和度值S满足一定条件时，预设调整系数等于根号S；当色饱和度值S满足另一条件时，预设调整系数等于三次根号S等公式也是可以的。
具体的，在确定预设调整系数之后，使用该预设调整系数的步骤，即，将第一颜色信号转换为在HSV体系下的第一色彩空间信号的步骤可以包括如下过程：
接收在RGB体系下的第一颜色信号；获取第一颜色信号Rn_i,j、Gn_i,j、Bn_i,j，并将每一组RGB三原色子像素灰阶信号转换成三原色归一化亮度信号r、g、b；完成转换得到第一归一化亮度信号rn_i,j、gn_i,j、bn_i,j；根据第一归一化亮度信号计算当前色饱和度信号S＝1-mini,j/maxi,j，获取当前色饱和度信号S对应的第一预设调整系数H1；保持maxi,j不变，使用第一预设调整系数H1对mini,j进行调整处理，得到第二色饱和度信号S’＝1-mini,j*H/maxi,j；根据第二色饱和度信号S’转换得到RGB体系下的第二颜色信号；使用第二颜色信号驱动显示面板；其中，mini,j＝min(rn_i,j、gn_i,j、bn_i,j)，其中，maxi,j＝max(rn_i,j、gn_i,j、bn_i,j)。本申请中，在RGB体系下，信号的色饱和度越高，色偏越严重；为了改善色偏，需要对色饱和度值高的色饱和度信号进行调低色饱和度值的操作；具体的，色饱和度信号S＝1-mini,j/maxi,j，其中该mini,j和maxi,j是变量，通过调整两者可以调整色饱和度值，在此方案中，主要是保持maxi,j不变，通过增大mini,j，从而实现色饱和度值调低的目的；如此调节之后，色饱和度信号，特别是色饱和度值过高的色饱和度信号将被调低，以改善色偏的，并且，本方案并不以牺牲可透光开口区为基础，因而，可以避免光透率的降低，避免显示面板生产成本的提升；另外，通过调高mini,j的方式，同时还提高mini,j的亮度，从而在改善色偏的同时，提升了显示面板的整体亮度，从而达到好的显示效果。
其中：Sn_i,j＝1-minn_i,j/maxn_i,j；其中，minn_i,j＝min(r,g,b)；maxn_i,j＝max(r,g,b)；其中，r＝(R/255)^γr、g＝(G/255)^γg、b＝(B/255)^γb；其中，γr、γg、γb为第一颜色信号的伽马信号；其中，R,G,B指的是第一颜色信号对应的RGB三原色灰阶数位信号。
在色饱和度调整的步骤中，需要获取对应的预设调整系数，对当前色饱和度信号进行调低色饱和度值的调整处理；
使用预设调整系数对当前色饱和度信号进行色饱和度值调低处理的步骤包括：获取第一色彩空间信号的当前色饱和度信号，检测当前色饱和度信号是否满足预设色饱和度阈值，以及是否位于调整色调区间，若均满足，则基于色饱和度信号、根据对应的色饱和度值和色调区间获取对应的预设调整系数。本方案中，仅部分色饱和度信号会进行调整操作，该部分的色饱和度信号不仅要满足色饱和 度阈值，而且，需要满足色调区间；这是因为不同色调区间色饱和度值和色偏的对应关系是不同的；色饱和度值越高，色偏越严重；另外，越靠近主色调，色偏越严重，例如，在240度色调的蓝色主色调对应的色调区间，同一色饱和度值情况下，其色偏程度远远超过300度色调的非调整色调区间；此时，该300度色调的色饱和度信号即便满足色饱和度阈值，但是对应的色偏程度也可能是很小而不需要进行改善的；同理，色饱和度值高，但是色调区间合适的话，对应的色饱和度信号的色偏可能并不会特别严重而不需要进行色饱和度调整；如此，仅对满足预设阈值和色调区间的色偏的色饱和度信号进行调整处理，例如降低色饱和度值的处理，可以在改善色偏的同时，而且可以避免对不需要进行色偏调整的信号进行不必要的如降低色饱和度值等处理，有利于提高显示面板的显示效果。
具体的，具体的，接收在RGB体系下的第一颜色信号；
获取第一颜色信号Rn_i,j、Gn_i,j、Bn_i,j，并将每一组RGB三原色子像素灰阶信号转换成三原色归一化亮度信号r、g、b；完成转换得到第一归一化亮度信号rn_i,j、gn_i,j、bn_i,j；
根据第一归一化亮度信号计算当前色饱和度信号S＝1-mini,j/maxi,j，获取当前色饱和度信号S对应的预设调整系数H；
保持maxi,j不变，使用预设调整系数H对mini,j进行调整处理，得到第二色饱和度信号S’＝1-mini,j*H/maxi,j；
根据第二色饱和度信号S’转换得到RGB体系下的第二颜色信号以驱动显示面板；其中，mini,j＝min(rn_i,j、gn_i,j、bn_i,j)，其中，maxi,j＝max(rn_i,j、gn_i,j、bn_i,j)。
其中，该色饱和度信号可以根据色调不同至少拆分为第一色调区间、第二色调区间和第三色调区间；获取当前色饱和度信号对应的预设调整系数的步骤中：
对应同一个色调，当前色饱和度信号的色饱和度值越大，调整处理的调整幅度越大。本方案中，由于同一色调区间，特别是同一色调下，色饱和度信号的色饱和度值越高，对应的色偏越严重；因而，本方案对色饱和度高的信号的调整幅度大，而色饱和度值低的信号的调整幅度小；其中，一般是对色饱和度信号进行色饱和度值的调低处理，减少各个信号的色饱和差距，避免色饱和度太高带来的色偏，同时，避免色饱和度差异过大带来的色偏，达到更好的改善色偏的效果。当然，该色饱和度值低的色饱和度信号进行调高处理也是可以的，以使得不同的色饱和度信号之间更均匀，也在一定程度上改善色偏的。另外，这里的调整幅度主要指的是调低色饱和度信号的幅度，根据计算公式的不同，色饱和度值越大，对应的预设调整系数也可能越小也可能越大，但是调整幅度越大的效果是不变的；举例，如果该预设调整系数是整个色饱和度信号的系数，例如S’＝S*H(其中，S为当前色饱和度信号，S’为第二色饱和度信号，H为预设调整系数)，则调低幅度越大时，预设调整系数的值越小；如果预设调整系数是色饱和度信号其中某个参数的系数时，则调低幅度越大，对应的系数也可能是越大的，例如S’＝1-min*H/max(其中，S为当前色饱和度信号，S’为第二色饱和度信号，H为预设调整系数)时，此时的预设调整系数越大，对应的调低幅度越大。
具体的，该第一色调区间、第二色调区间和第三色调区间分别为红色色调区间、绿色色调区间和蓝色色调区间；具有同一色饱和度值的当前色饱和度信号， 对应蓝色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度，大于对应红色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度；对应红色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度，大于对应绿色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度。本方案中，基于不同色调区间的色饱和度信号的色偏程度不同，在同一色饱和度值情况下，其中部分色调区间的色偏严重，而部分色调区间的色偏轻；在RGB体系下，蓝色色调区间的色饱和度信号的色偏最严重，绿色色调区间的色饱和度信号的色偏最轻；本方案，以S’＝S*H为例，对应蓝色色调区间的预设调整系数可以小于对应红色色调区间的预设调整系数，对应红色色调区间的预设调整系数可以小于对应绿色色调区间的预设调整系数，此时预设调整系数越小，调整的幅度越大；对应的，以S’＝1-min*H/max为例，此时对应蓝色色调区间的预设调整系数最大且调整幅度最大，对应绿色色调区间的预设调整系数最小且调整幅度最小；如此同一色饱和度值下，该蓝色色调区间的色饱和度信号的调低幅度最大，而该绿色色调区间的色饱和度信号调低幅度最小，不仅减少了色饱和度值过大带来的色偏，而且使得色饱和度信号的色饱和度更均匀，在一定程度上也有利于改善色偏，从而达到良好的改善色偏的效果。
在一实施例中，该色饱和度信号根据色调区间不同拆分为红色色调区间、绿色色调区间、蓝色色调区间和非调整色调区间；
所述色调值Hue的范围为：0-360，对应0-360度，其中：
色调值满足如下公式的色调区间为红色色调区间：0≤Hue＜40，或320＜Hue≤360；色调值满足如下公式的色调区间为绿色色调区间：80＜Hue＜160；色调值满足如下公式的色调区间划分为蓝色色调区间：200＜Hue＜280；色调值满足如下公式的色调区间为非调整色调区间：40≤Hue≤80，或160≤Hue≤200，或280≤Hue≤320。
本方案，鉴于RGB体系下，定义0度为红色色调，120度为绿色色调，240度为蓝色色调，在同一色饱和度值的前提下，越靠近红绿蓝色色调，则色偏越严重，而越远离红绿蓝色色调的饱和度信号色偏越轻，甚至符合色偏的标准而不需要进行色偏调节；本方案中，将靠近绿色色调的划分为绿色色调区间、将靠近蓝色色调的划分为蓝色色调区间、将靠近红色色调的划分为红色色调区间；而对远离红绿蓝色色调则划分为非调整区间，如此，可以对应同一色饱和度值，色偏最严重的蓝色色调区间，对应设置最大的预设调整系数；色偏轻的绿色色调区间，对应设置小的预设调整系数；而对几乎不存在色偏的非调整区间，则不进行调整或者设置预设调整系数为1，如此，在改善色偏的同时，尽量避免色饱和度值的降低，有利于提高显示面板的显示效果。
本实施可选的，该使用预设调整系数对当前色饱和度信号S进行色饱和度值调低处理；完成色饱和度信号的调整处理，得到并根据第二色饱和度信号S’转换得到在HSV体系下的第二色彩空间信号的步骤中：根据当前色饱和度信号S和第二色饱和度信号S’，计算得到第三色饱和度信号S”；完成两次色饱和度值调整，基于第三色饱和度信号S”，得到在HSV体系下的第二色彩空间信号；
根据第二色彩空间信号转换为RGB体系下的第二颜色信号以驱动显示面板。
在色饱和度调整的阶段：
图8是本申请实施例的当前色饱和度信号和第二色饱和度信号的变化示意 图，图9是本申请实施例的当前色饱和度信号和第二色饱和度信号的色差变化曲线图，图10是本申请实施例的当前色饱和度信号和第二色饱和度信号的色差变化示意图。其中，该图9的色差变化图，可以是正视角情况下的。当然，也可以是侧视角情况下的。该图10中的虚线是当前色饱和度信号在各种色系下对应的色差变化，实线是第二色饱和度信号在各种色系下对应的色差变化。
具体的，显示器的输入信号RGB三原色信号，如果显示器的驱动采用8bit颜色解析度，则RGB三原色输入信号的阶调即可分解为0,1,2…255灰阶驱动信号。本申请将RGB三原色输入信号转换成HSV色彩空间信号，在HSV的色彩空间下根据不同的色调和色饱和度值调整色饱和度来达到色偏改善的效果。
参考附图1，液晶显示器各种代表性色系的大视角与正视视角色偏变化，可以明显发现，偏R、G、B色相的色系大视角色偏情况均较其他色系来得严重，因此解决R、G、B色相的色偏缺陷可以大大提升大视角的整体色偏改善。
其中，RGB体系下的颜色信号或者说RGB三原色信号转换成HSV信号的计算方式如下描述：RGB三原色的输入信号为0,1,…255的8bit灰阶数位信号，各灰阶信号对应于255输入信号的亮度归一化信号(以255灰阶为最大亮度)分别为r、g、b；其中r＝(R/255)^γr、g＝(G/255)^γg、b＝(B/255)^γb，其中γr、γg、γb为所谓gamma信号，将数位灰阶信号转换为亮度信号的指数参数。H为色调信号，r,g,b规一化亮度信号透过转换成色调h及饱和度s信号。其中，H为颜色代表，由0度～360度代表不同色相颜色呈现，其中定义0度为红色，120度为绿色，240度为蓝色。其中，R为红色灰阶数位信号，G为绿色灰阶数位信号，B为蓝色灰阶数位信号；min为r,g,b中的最小值，max为r,g,b中的最大值。
r,g,b规一化亮度信号与色调h及饱和度信号s的转换关系，满足如下公式：
Figure PCTCN2019077601-appb-000001
Figure PCTCN2019077601-appb-000002
综上可发现，当色调接近R、G、B纯色色调时，存在视角观赏的色偏劣化较为明显，同时当色调接近R、G、B纯色色调时色饱和度s越大则色偏现象越发明显。可以透过降低R、G、B纯色色调时色饱和度s，即越接近纯色色调，色饱和度调整幅度越大，让大视角观赏的颜色相较于正视观察的颜色改善彭或消除色偏。另外，在完成色饱和度调整之后，还可以增加一个检测步骤，例如，将色饱和度信号转换为CIE Lu’v’色彩空间信号(CIE，Commission Internationale de  L'Eclairage，国际照明委员会)，其中L是亮度坐标，u’和v’是色度坐标。为了改善色偏，色饱和度调整对当前色饱和度信号进行降低色饱和度值的处理，但是若是为了尽量减少色饱和度损失的话，纯色变化，即从当前色饱和度信号S，到第二色饱和度信号S’的变化，即纯度变化或色差Δuv，应当满足：Δuv＝√((u_1-u_2)^2+(v_1-v_2)^2)≤0.02。其中，u_1和v_1是当前色饱和度信号的色度坐标，该u_2和v_2是第二色饱和度信号的色度坐标，即色饱和度调整之后的色饱和度信号。
图11是本申请一种显示面板的驱动系统的示意图，图12是本申请实施例一种显示面板的驱动电路示意图；图13是本申请实施例一种背光模组的驱动电路示意图；参考图11-13，结合图1-图10可知：本申请还公开了一种显示模组的驱动系统100，使用上述任一一种显示模组的驱动方法，包括：
同步驱动的显示面板驱动电路110，以及背光模组驱动电路120；
显示模组包括多个独立控制的第一颜色光源130和第二颜色光源140；
显示面板驱动电路110，包括：
接收电路111，接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；
色饱和度调整电路112，使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号；根据第二色彩空间信号转换得到RGB体系下的第二颜色信号：
即第一驱动电路113，使用第二颜色信号驱动显示面板；
背光模组驱动电路120包括：
光源调整计算电路121，接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；
光源调整电路122，使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；
主色调光源计算电路123，从第一颜色光源和第二颜色光源中确定主色调光源；以及第二驱动电路124，使用第二亮度值对主色调光源进行驱动。
图14是本申请一种显示装置的示意图，参考图14，结合图1-图13可知：本申请还公开了一种显示装置200，包括如本申请的一种显示模组的驱动系统100。
需要说明的是，本方案中涉及到的各步骤的限定，在不影响具体方案实施的前提下，并不认定为对步骤先后顺序做出限定，写在前面的步骤可以是在先执行的，也可以是在后执行的，甚至也可以是同时执行的，只要能实施本方案，都应当视为属于本申请的保护范围。
本申请的技术方案可以广泛用于各种显示面板，适用即可。
以上内容是结合具体的优选实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (19)

  1. 一种显示模组的驱动方法，包括同步驱动的显示面板驱动过程，以及背光模组驱动过程：
    所述显示模组包括多个独立控制的第一颜色光源和第二颜色光源；
    所述显示面板的驱动过程包括步骤：
    接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；
    使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号；根据第二色彩空间信号转换得到RGB体系下的第二颜色信号：
    使用第二颜色信号驱动显示面板；
    所述背光模组驱动过程包括：
    接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；
    使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；
    从第一颜色光源和第二颜色光源中确定主色调光源；
    使用第二亮度值对主色调光源进行驱动。
  2. 如权利要求1所述的一种显示模组的驱动方法，其中，所述显示模组为直下式背光显示模组，所述直下式背光显示模组包括多个背光分区，每个所述背光分区分别包括多个独立控制的所述第一颜色光源和第二颜色光源；
    所述背光分区还包括多个独立控制的第三颜色光源；
    所述确定主色调光源的步骤包括：
    从第一颜色光源、第二颜色光源和第三颜色光源中确定主色调光源。
  3. 如权利要求2所述的一种显示模组的驱动方法，其中，所述根据第一色彩空间信号和第二色彩空间信号得到光源调整系数的步骤包括：
    获取当前帧对应当前背光分区内的所有像素的第一色彩空间信号和第二色彩空间信号，分别计算第一色彩空间信号对应的第一平均色饱和度信号，以及第二色彩空间信号对应的第二平均色饱和度信号；
    根据第一平均色饱和度信号和第二平均色饱和度信号计算得到光源调整系数。
  4. 如权利要求3所述的一种显示模组的驱动方法，其中，所述第一颜色信号是RGB体系下的RGB三原色信号，所述第一颜色信号包括红色子像素信号、绿色子像素信号和蓝色子像素信号；
    所述根据第一颜色信号和第二颜色信号得到光源调整系数的步骤包括：
    获取当前帧对应当前背光分区内的所有像素第一颜色信号，计算对应的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最大平均信号maxn_ave和minn_ave；
    根据最大平均信号和最小平均信号计算的得到第一平均色饱和度信号Sn_ave＝1-minn_ave/maxn_ave；
    计算第二颜色信号的最大平均信号max’n_ave及最小平均信号min’n_ave；
    根据最大平均信号和最小平均信号计算的得到第二平均色饱和度信号S’n_ave＝1-min’n_ave/max’n_ave；
    根据第一平均色饱和度信号和第二平均色饱和度信号计算所述光源调整系数y，使得光源调整系数y满足如下公式：
    Sn_ave＝1-minn_ave/maxn_ave＝1-min’n_ave/(max’n_ave*y)即，y＝(min’n_ave*maxn_ave)/(minn_ave*max’n_ave)。
  5. 如权利要求3所述的一种显示模组的驱动方法，其中，所述光源调整系数的计算包括如下步骤：
    使用公式Sn_ave＝Average(Sn_1,1、Sn_1,2、…、Sn_i,j)，计算第一色彩空间信号对应的第一平均色饱和度信号；
    使用公式S’n_ave＝Average(S’n_1,1、S’n_1,2、…、S’n_i,j)计算第二色彩空间信号对应的第二平均色饱和度信号；
    根据第一平均色饱和度信号Sn_ave和第二平均色饱和度信号S’n_ave计算得到光源调整系数。
  6. 如权利要求5所述的一种显示模组的驱动方法，其中，所述根据第一平均色饱和度信号和第二平均色饱和度信号计算所述光源调整系数的步骤包括：
    计算第一平均色饱和度信号Sn_ave＝1-minn_ave/maxn_ave；以及第二平均色饱和度信号S’n_ave＝1-min’n_ave/max’n_ave；
    使用光源调整系数对第二平均色饱和度信号得到第三平均色饱和度信号S”n_ave；
    其中max’n_ave＝maxn_ave，且光源调整系数y满足如下公式：
    S”n_ave＝Sn_ave，即：
    1-minn_ave/maxn_ave＝1-min’n_ave/(max’n_ave*y)，
    因而，y＝(S’n_ave-1)/(Sn_ave-1)；
    其中，maxn_ave是当前帧对应背光分区内的所有像素的第一颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最大平均信号；minn_ave是当前帧对应背光分区内的所有像素的第一颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最小平均信号；
    其中，max’n_ave是当前帧对应背光分区内的所有像素的第一颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最大平均信号；min’n_ave是当前帧对应背光分区内的所有像素的第二颜色信号的红色子像素平均信号、绿色子像素平均信号和蓝色子像素平均信号中的最小平均信号。
  7. 如权利要求4或6所述的一种显示模组的驱动方法，其中，所述从第一颜色光源、第二颜色光源和第三颜色光源中确定主色调光源的步骤包括：
    获取第二色饱和度信号的最大平均信号max’n_ave＝Max(r’n_ave、g’n_ave、b’n_ave)；
    将最大平均信号对应的颜色光源作为主色调光源。
  8. 如权利要求1所述的一种显示模组的驱动方法，其中，所述使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号的步骤包括：
    获取第一色彩空间信号的当前色饱和度信号，检测当前色饱和度信号是否满足预设色饱和度阈值，以及是否位于调整色调区间，若均满足，则基于色饱和度信号、根据对应的色饱和度值和色调区间获取对应的预设调整系数；
    使用预设调整系数对当前色饱和度信号进行调整，得到HSV体系下的第二色彩空间信号。
  9. 如权利要求8所述的一种显示模组的驱动方法，其中，所述预设调整系数是基于色饱和度信号根据预设的计算公式计算得到或基于色饱和度信号通过预设调整系数查找表查找得到的。
  10. 如权利要求8所述的一种显示模组的驱动方法，其中，所述调整系数查找表可以是直接记载有预设调整系数的查找表，也可以是记录预设的计算公式的系数的查找表。
  11. 如权利要求10所述的一种显示模组的驱动方法，其中，第二色彩空间信号和第一色彩空间信号可以符合如下公式：
    S’＝a*S4+b*S3+c*S2+d*S+e；
    其中，S为第一色彩空间信号对应的当前色饱和度信号，S’为第二色彩空间信号对应的色饱和度信号；所述a,b,c,d,e为常数，所述a,b,c,d,e根据色饱和度值和色调区间不同，通过预设的公式系数查找表查找得到。
  12. 如权利要求8所述的一种显示模组的驱动方法，其中，所述获取当前色饱和度信号对应的预设调整系数的步骤中：对应同一个色调，当前色饱和度信号的色饱和度值越大，调整处理的调整幅度越大
  13. 如权利要求12所述的一种显示模组的驱动方法，其中，所述色饱和度信号根据色调不同至少拆分为第一色调区间、第二色调区间和第三色调区间；
    第一色调区间、第二色调区间和第三色调区间分别为红色色调区间、绿色色调区间和蓝色色调区间；
    具有同一色饱和度值的当前色饱和度信号，对应蓝色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度，大于对应红色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度；对应红色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度，大于对应绿色色调区间的所述预设调整系数对当前色饱和度信号的调整幅度。
  14. 如权利要求13所述的一种显示模组的驱动方法，其中，所述色调值Hue的范围为：0-360，对应0-360度，其中：
    色调值满足如下公式的色调区间为红色色调区间：0≤Hue＜40，或320＜Hue≤360；
    色调值满足如下公式的色调区间为绿色色调区间：80＜Hue＜160；
    色调值满足如下公式的色调区间划分为蓝色色调区间：200＜Hue＜280；
    色调值满足如下公式的色调区间为非调整色调区间：40≤Hue≤80，或160≤Hue≤200，或280≤Hue≤320。
  15. 如权利要求1所述的一种显示模组的驱动方法，其中，所述使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号的步骤包括：
    获取第一色彩空间信号的当前色饱和度信号，检测当前色饱和度信号是否满足预设色饱和度阈值，以及是否位于调整色调区间，若均满足，则基于色饱和度信号、根据对应的色饱和度值和色调区间获取对应的预设调整系数；
    使用预设调整系数对当前色饱和度信号进行调整，得到HSV体系下的第二色彩空间信号；
    预设调整系数是基于色饱和度信号根据预设的计算公式计算得到或基于色饱和度信号通过预设调整系数查找表查找得到的。
  16. 如权利要求15所述的一种显示模组的驱动方法，其中，所述色饱和度阈值为0.5，当前色饱和度信号的色饱和度值大于0.5的则判定满足色饱和度阈值。
  17. 如权利要求16所述的一种显示模组的驱动方法，其中，所述色饱和度阈值为0.5-1，不包括0.5和1。
  18. 一种显示模组的驱动系统，包括：
    同步驱动的显示面板驱动电路，以及背光模组驱动电路；
    所述显示模组包括多个独立控制的第一颜色光源和第二颜色光源；
    所述显示面板驱动电路，包括：接收电路、色饱和度调整电路和第一驱动电路；
    所述接收电路接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；所述色饱和度调整电路使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号；根据第二色彩空间信号转换得到RGB体系下的第二颜色信号：所述第一驱动电路，使用第二颜色信号驱动显示面板；
    所述背光模组驱动电路包括：光源调整计算电路、光源调整电路、主色调光源计算电路和第二驱动电路；
    所述光源调整计算电路接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；所述光源调整电路使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；所述主色调光源计算电路从第一颜色光源和第二颜色光源中确定主色调光源；所述第二驱动电路使用第二亮度值对主色调光源进行驱动。
  19. 一种显示装置，包括一种显示模组的驱动系统，所述驱动系统包括：
    同步驱动的显示面板驱动电路，以及背光模组驱动电路；
    所述显示模组包括多个独立控制的第一颜色光源和第二颜色光源；
    所述显示面板驱动电路包括：接收电路、色饱和度调整电路和第一驱动电路；
    所述接收电路接收显示面板对应的RGB体系下的第一颜色信号，将第一颜色信号转换为在HSV体系下的第一色彩空间信号；所述色饱和度调整电路使用预设调整系数第一色彩空间信号的进行色饱和度调整，得到在HSV体系下的第二色彩空间信号；根据第二色彩空间信号转换得到RGB体系下的第二颜色信号：所述第一驱动电路，使用第二颜色信号驱动显示面板；
    所述背光模组驱动电路包括：光源调整计算电路、光源调整电路、主色调光源计算电路和第二驱动电路；
    所述光源调整计算电路接收显示面板对应的RGB体系下第一颜色信号，并获得在HSV体系下第一色彩空间信号和第二色彩空间信号，根据第一色彩空间信号和第二色彩空间信号得到光源调整系数；所述光源调整电路使用光源调整系数对第一颜色光源和/或第二颜色光源对应的第一亮度值进行调整得到第二亮度值；所述主色调光源计算电路从第一颜色光源和第二颜色光源中确定主色调光源；所述第二驱动电路使用第二亮度值对主色调光源进行驱动。
PCT/CN2019/077601 2018-12-11 2019-03-11 显示模组的驱动方法、驱动系统和驱动装置 Ceased WO2020118924A1 (zh)

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