WO2018113050A1 - 一种显示面板的驱动方法及驱动装置 - Google Patents

一种显示面板的驱动方法及驱动装置 Download PDF

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Publication number
WO2018113050A1
WO2018113050A1 PCT/CN2017/070531 CN2017070531W WO2018113050A1 WO 2018113050 A1 WO2018113050 A1 WO 2018113050A1 CN 2017070531 W CN2017070531 W CN 2017070531W WO 2018113050 A1 WO2018113050 A1 WO 2018113050A1
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pixel
current
background white
grayscale value
color sub
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PCT/CN2017/070531
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English (en)
French (fr)
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郭星灵
谭小平
秦杰辉
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武汉华星光电技术有限公司
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Priority to US15/325,082 priority Critical patent/US10347199B2/en
Publication of WO2018113050A1 publication Critical patent/WO2018113050A1/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
    • G09G3/36—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
    • 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
    • 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
    • G09G3/2003—Display 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or 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
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    • G—PHYSICS
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    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • G—PHYSICS
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    • 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
    • G09G3/2007—Display of intermediate tones

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a driving method and a driving device for a display panel.
  • an RGB display panel includes an array of pixel cells, and each pixel unit in the pixel cell array may include three sub-pixel units of R (Red, Red), G (Green, Green), and B (Blue).
  • each pixel unit in the pixel unit array may include a W (White, white) sub-pixel unit in addition to three sub-pixel units of R, G, and B, thereby forming an RGBW display panel.
  • W White, white
  • the size of the four sub-pixel units of R, G, B, and W is equal to the size of the six sub-pixel units R, G, and B in the original RGB display panel, that is, the unit area.
  • the area of the R, G, B, and W sub-pixel units in the RGBW display panel is 1/4, respectively, and the area of the R, G, and B sub-pixel units in the RGB display panel is 1/3, respectively, thereby making the RGBW display panel
  • the aperture ratio of the three sub-pixel units R, G, and B is 75% of that of the conventional RGB display panel.
  • the RGBW display panel is introduced into the W pixel unit, the introduction of the W pixel unit leads to an increase in the contrast of the screen. According to the visual characteristics of the human eye, in the case of strong contrast, the human eye sees a solid color picture feeling dark.
  • the technical problem to be solved by the present invention is to provide a driving method and a driving device for a display panel, which can improve the brightness of a display panel including an RGBW sub-pixel unit when displaying a solid color screen.
  • a technical solution adopted by the present invention is to provide a driving method of a display panel, the driving method comprising: acquiring three-color sub-pixel data of each pixel in a current image; Acquiring the saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel; obtaining the current background white ratio corresponding to the current image according to the three-color sub-pixel data and the saturation of each pixel, wherein the current background white ratio The ratio of the pixel point to the total pixel point satisfying the predetermined condition in the saturation and the three-color sub-pixel data in the current image; determining whether the current background white ratio is within a predetermined adjustment range; if the current background white is within the predetermined adjustment range, according to The current background white ratio reduces the white grayscale value in the four-color sub-pixel data corresponding to the current image and outputs the reduced white grayscale value to the display panel; wherein, the current background white ratio reduces the four-color sub-corresponding to the current image
  • the three-color sub-pixel data includes a red grayscale value R1, a green grayscale value G1, and a blue grayscale value B1.
  • the step of obtaining the saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel point includes:
  • Max(R1, G1, B1) is the maximum value of the red grayscale value R1, the green grayscale value G1, and the blue grayscale value B1
  • Min(R1, G1, B1) is red gray.
  • the step of acquiring the background white ratio corresponding to the current image according to the three-color sub-pixel data and the saturation of each pixel point includes: acquiring the pixel point of the tri-color sub-pixel data in which the grayscale value of any color is greater than the second predetermined value.
  • the set is recorded as a first set of pixel points; a set of pixel points in which the saturation is less than a third predetermined value is obtained as a second set of pixel points in the first set of pixel points; and the number of pixels in the second set of pixel points is obtained as The first number; the total number of pixels in the current image is recorded as a second number; wherein the background white ratio is a ratio of the first number to the second number.
  • a driving method of the board comprises: acquiring three-color sub-pixel data of each pixel point in the current image; acquiring saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel point; according to the three colors of each pixel point
  • the sub-pixel data and the saturation obtain the current background white ratio corresponding to the current image, wherein the current background white ratio is a ratio of the saturation of the current image and the ratio of the pixel point of the three-color sub-pixel data satisfying the predetermined condition to the total pixel point; Whether the current background white ratio is within a predetermined adjustment range; if the current background white occupies within a predetermined adjustment range, the white grayscale value in the four-color sub-pixel data corresponding to the current image is decreased according to the current background white ratio and the output is reduced.
  • White grayscale value to the display panel comprises: acquiring three-color sub-pixel data of each pixel point in the current image; acquiring saturation corresponding to each pixel point according to the three-color sub-pixel data of each
  • the step of reducing the white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current background white ratio includes: obtaining the current current white background ratio corresponding to the current background white ratio according to a predetermined background white ratio a gain coefficient; reducing a white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current gain coefficient.
  • the step of determining whether the current background white ratio is within the predetermined adjustment range comprises: determining whether the current background white ratio is greater than a first predetermined value; wherein, when the current background white ratio is greater than the first predetermined value, determining the current background white The proportion is within the predetermined adjustment range.
  • the three-color sub-pixel data includes a red grayscale value R1, a green grayscale value G1, and a blue grayscale value B1.
  • the step of obtaining the saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel point includes:
  • Max(R1, G1, B1) is the maximum value of the red grayscale value R1, the green grayscale value G1, and the blue grayscale value B1
  • Min(R1, G1, B1) is red gray.
  • the step of acquiring the background white ratio corresponding to the current image according to the three-color sub-pixel data and the saturation of each pixel point includes: acquiring the pixel point of the tri-color sub-pixel data in which the grayscale value of any color is greater than the second predetermined value.
  • the set is recorded as a first set of pixel points; a set of pixel points in which the saturation is less than a third predetermined value is obtained as a second set of pixel points in the first set of pixel points; and the number of pixels in the second set of pixel points is obtained as The first number; the total number of pixels in the current image is recorded as the second number; wherein
  • the background white ratio is the ratio of the first number to the second number.
  • a driving device for a display panel comprising: a first acquiring module, configured to acquire three-color sub-pixel data of each pixel in the current image.
  • a second acquisition module configured to be connected to the first acquisition module, configured to acquire saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel obtained by the first acquisition module; and the third acquisition module respectively obtains the first acquisition
  • the module is connected to the second acquiring module, and is configured to obtain a current background white ratio corresponding to the current image according to the three-color sub-pixel data of each pixel acquired by the first obtaining module and the saturation acquired by the second acquiring module, where the current background
  • the white ratio is the ratio of the pixel point and the total pixel point in the current image in which the saturation and the three-color sub-pixel data satisfy the predetermined condition;
  • the determining module is connected to the third acquiring module, and is used for determining the current background white acquired by the third acquiring module
  • the processing module is connected to the judging module, and is used to judge the current background white ratio when the judging module judges Within a predetermined adjustment range, the proportion of the white background of the current reduction of the current white grayscale value data of four-color sub-pixel corresponding to the image and outputting the white grayscale value is lowered to the display panel.
  • the processing module includes: an obtaining unit, configured to acquire a current gain coefficient corresponding to a current background white ratio according to a predetermined relationship between a background white ratio and a gain coefficient; and the processing unit is connected to the acquiring unit, and configured to acquire according to the acquiring unit
  • the current gain coefficient reduces the white grayscale value in the four-color sub-pixel data corresponding to the current image.
  • the determining module determines whether the current background white ratio is within a predetermined adjustment range: the determining module determines whether the current background white ratio is greater than a first predetermined value; wherein, when the determining module determines that the current background white ratio is greater than the first When the value is predetermined, it is determined that the background white ratio is within the predetermined adjustment range.
  • the three-color sub-pixel data includes a red grayscale value R1, a green grayscale value G1, and a blue grayscale value B1, and the saturation corresponding to each pixel point is calculated according to the following formula:
  • Max(R1, G1, B1) is the maximum value of the red grayscale value R1, the green grayscale value G1, and the blue grayscale value B1
  • Min(R1, G1, B1) is red gray.
  • the obtaining, by the third obtaining module, the background white ratio of the current image according to the three-color sub-pixel data and the saturation of each pixel includes: obtaining, by the third acquiring module, the grayscale value of any color in the three-color sub-pixel data is greater than
  • the set of pixel points of the second predetermined value is recorded as a first set of pixel points; the set of pixel points in which the saturation is less than the third predetermined value is obtained as the second set of pixel points in the first set of pixel points; and the second pixel point is acquired
  • the number of pixels in the set is recorded as the first number; the total number of pixels in the current image is recorded as the second number; wherein the background white ratio is the ratio of the first number to the second number.
  • the invention has the beneficial effects that the driving method and the driving device of the display panel of the present invention are obtained by acquiring three-color sub-pixel data of each pixel in the current image according to the three-color sub-pixel data of each pixel point.
  • the saturation corresponding to each pixel point, according to the three-color sub-pixel data and saturation of each pixel point, the current background white ratio corresponding to the current image is obtained, and when it is determined that the current background white ratio is within the predetermined adjustment range, according to the current background white
  • the ratio reduces the white grayscale value in the four-color sub-pixel data corresponding to the current image and outputs the reduced white grayscale value to the display panel.
  • the present invention can improve the brightness of the display panel including the RGBW sub-pixel unit when displaying a solid color picture, so that the problem of darkness does not occur when displaying a solid color picture.
  • FIG. 1 is a schematic flow chart of a driving method of a display panel according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing a background white ratio and a gain coefficient of an embodiment of the present invention
  • FIG 3 is a schematic structural view of a driving device of a display panel according to an embodiment of the present invention.
  • FIG. 1 is a schematic flow chart of a driving method of a display panel according to an embodiment of the present invention. It should be noted that If substantially the same result is obtained, the method of the present invention is not limited to the flow sequence shown in FIG. As shown in FIG. 1, the method includes the following steps:
  • Step S101 Acquire three-color sub-pixel data of each pixel in the current image.
  • the three-color sub-pixel data includes a red grayscale value R1, a green grayscale value G1, and a blue grayscale value B1, respectively.
  • Step S102 Acquire saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel point.
  • step S102 the saturation corresponding to each pixel point is calculated according to the following formula:
  • Max(R1, G1, B1) is the maximum value of the red grayscale value R1, the green grayscale value G1, and the blue grayscale value B1
  • Min(R1, G1, B1) is red gray.
  • Step S103 Acquire a current background white ratio corresponding to the current image according to the three-color sub-pixel data and the saturation of each pixel.
  • the background white ratio is a ratio of the pixel point to the total pixel point in which the saturation and the three-color sub-pixel data in the current image satisfy the predetermined condition.
  • the predetermined condition is specifically: any one of the red grayscale value R1, the green grayscale value G1, and the blue grayscale value B1 of the pixel point is greater than a second predetermined value, and the pixel is simultaneously The saturation of the point is less than the third predetermined value.
  • the second predetermined value is 150 and the third predetermined value is 0.2.
  • the step of acquiring the current background white ratio corresponding to the current image according to the three-color sub-pixel data and the saturation of each pixel point is specifically: acquiring gray of any color in the three-color sub-pixel data.
  • a set of pixel points whose order value is greater than a second predetermined value is recorded as a first set of pixel points; and a set of pixel points whose saturation is less than a third predetermined value is obtained as a second set of pixel points in the first set of pixel points;
  • the number of pixels in the set of two pixels is recorded as the first number; the total number of pixels in the current image is recorded as the second number; wherein the background white ratio is the ratio of the first number to the second number.
  • the white saturation is 0, and the background white can be understood as a pixel of a solid color whose saturation value is below a certain threshold.
  • Step S104 determining whether the current background white ratio is within a predetermined adjustment range. If the current background white ratio is within the predetermined adjustment range, step S105 is performed, otherwise step S106 is performed.
  • step S104 in the embodiment, the step of determining whether the current background white ratio is within the predetermined adjustment range is specifically: determining whether the current background white ratio is greater than the first predetermined value. When the current background white ratio is greater than the first predetermined value, it indicates that the current image has a low saturation background, and then step S105 is performed. When the background white ratio is less than or equal to the first predetermined value, the current image is a high saturation solid color screen, and step S106 is performed.
  • Step S105 Decrease the white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current background white ratio and output the reduced white grayscale value to the display panel.
  • step S105 the step of reducing the white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current background white ratio comprises: obtaining the current background white ratio according to the correspondence between the predetermined background white ratio and the gain coefficient. Corresponding current gain coefficient; reducing white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current gain coefficient.
  • FIG. 2 is a schematic diagram of a background white ratio and a gain coefficient according to an embodiment of the present invention.
  • the horizontal axis W-ratio represents the background white ratio, and the value ranges from 0 to 1
  • the vertical axis W-gain represents the gain coefficient, which ranges from 0 to 1.
  • X1 is a first predetermined value and X2 is a fourth predetermined value.
  • step S106 when the background white is relatively small (that is, less than or equal to the first predetermined value X1), the current picture is a high-saturation solid color picture, and the gain coefficient tends to be 1, and step S106 is performed, and background dimming is not required. deal with.
  • the background white is relatively large (that is, greater than the first predetermined value X1), the current image has a low saturation background, and step S105 is performed to perform background dimming processing according to the gain coefficient.
  • the background white ratio is large (that is, greater than or equal to the fourth predetermined value)
  • the current image is a relatively bright picture and the solid color is less.
  • the gain factor tends to be 1, and the background dimming process may not be performed.
  • the step of determining whether the current background white ratio is within a predetermined adjustment range may also be: determining whether the current background white ratio is determined by the first predetermined value and the fourth predetermined value. Within a predetermined adjustment range, wherein the fourth predetermined value is greater than the first predetermined value. If the current background white ratio is within a predetermined adjustment range determined by the first predetermined value and the fourth predetermined value, that is, when the current white background ratio is greater than the first predetermined value X1 and less than the fourth predetermined value X2, then the step is performed S105, otherwise step S106 is performed.
  • the step of reducing the white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current gain coefficient is specifically: multiplying the current gain coefficient by the white grayscale value in the four-color sub-pixel data as the lowering After the white grayscale value.
  • multiplying the white grayscale value in the four-color sub-pixel by the current gain coefficient causes the white grayscale value to decrease and also the current image.
  • the background is reduced when the current background white ratio is within a predetermined adjustment range, which reduces the feeling of dark color caused by high contrast of the human eye, and effectively improves the dark color of the RGBW display panel.
  • the four-color sub-pixel data corresponding to the current image is obtained from the three-color sub-pixel data of each pixel.
  • the step of acquiring corresponding four-color sub-pixel data according to the three-color sub-pixel data of each pixel point includes:
  • the four-color sub-pixel data is calculated according to the following formula:
  • W2 Min(R1, G1, B1)
  • G2 G1*Gain-W2;
  • R2 R1*Gain-W2
  • the four-color sub-pixel data respectively includes a red grayscale value R2, a green grayscale value G2, a blue grayscale value B2, and a white grayscale value W2;
  • the three-color sub-pixel data is a known value, which respectively includes a red grayscale a value R1, a green grayscale value G1, and a blue grayscale value B1;
  • Gain is a predetermined gain value;
  • Min (R1, G1, B1) is a red grayscale value R1, a green grayscale value G1, and a blue grayscale value B1. The minimum value.
  • Step S106 Keep the white grayscale value in the four-color sub-pixel corresponding to the current image unchanged and output to the display panel.
  • step S106 when the current background white ratio is not within the predetermined adjustment range, the white grayscale value in the four-color sub-pixel corresponding to the current image is kept unchanged and output to the display panel.
  • the driving device includes a first acquiring module 21, a second acquiring module 22, a third obtaining module 23, a determining module 24, and a processing module 25.
  • the first obtaining module 21 is configured to acquire three-color sub-pixel data of each pixel in the current image.
  • the three-color sub-pixel data includes a red grayscale value R1, a green grayscale value G1, and a blue grayscale value B1.
  • the second obtaining module 22 is connected to the first obtaining module 21, and is configured to acquire the saturation corresponding to each pixel point according to the three-color sub-pixel data of each pixel point acquired by the first acquiring module 21.
  • the saturation corresponding to each pixel point is calculated according to the following formula:
  • Max(R1, G1, B1) is the maximum value of the red grayscale value R1, the green grayscale value G1, and the blue grayscale value B1
  • Min(R1, G1, B1) is red gray.
  • the third obtaining module 23 is connected to the first obtaining module 21 and the second obtaining module 22, respectively, for acquiring the three-color sub-pixel data of each pixel obtained by the first acquiring module 21 and the saturation acquired by the second acquiring module 22
  • the current background white ratio corresponding to the current image wherein the current background white ratio is a ratio of the pixel point and the total pixel point in the current image in which the saturation and the three-color sub-pixel data satisfy the predetermined condition.
  • the third obtaining module 23 obtains the background white ratio corresponding to the current image according to the three-color sub-pixel data and the saturation of each pixel point.
  • the third obtaining module 23 acquires any of the three-color sub-pixel data.
  • a set of pixel points whose grayscale value of the color is greater than the second predetermined value is recorded as a first set of pixel points; and a set of pixel points whose saturation is less than a third predetermined value is obtained in the first set of pixel points is recorded as a second set of pixel points
  • Obtaining the number of pixels in the second set of pixels is recorded as the first number; obtaining the total number of pixels in the current image is recorded as the second number; wherein the background white ratio is the ratio of the first number to the second number.
  • the determining module 24 is connected to the third obtaining module 23, and is configured to determine when the third acquiring module 23 obtains Whether the front background white ratio is within the predetermined adjustment range.
  • the determining module 24 determines whether the current background white ratio is within the predetermined adjustment range. The determining module 24 determines whether the current background white ratio is greater than the first predetermined value. When the background white ratio is greater than the first predetermined value, it is determined that the background white ratio is within the predetermined adjustment range.
  • the processing module 25 is connected to the determining module 24, and is configured to: when the determining module 24 determines that the current background white ratio is within the predetermined adjustment range, reduce the white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current background white ratio. And output the reduced white grayscale value to the display panel.
  • the processing module 25 includes an obtaining unit 251 and a processing unit 252.
  • the obtaining unit 251 is connected to the determining module 24, and configured to: when the determining module 24 determines that the current background white ratio is within the predetermined adjustment range, obtain the current current white background ratio corresponding to the current background white ratio and the gain coefficient. Gain factor.
  • the processing unit 252 is connected to the obtaining unit 251, and is configured to reduce a white grayscale value in the four-color sub-pixel data corresponding to the current image according to the current gain coefficient acquired by the acquiring unit 2551.
  • the invention has the beneficial effects that the driving method and the driving device of the display panel of the present invention are obtained by acquiring three-color sub-pixel data of each pixel in the current image according to the three-color sub-pixel data of each pixel point.
  • the saturation corresponding to each pixel point, according to the three-color sub-pixel data and the saturation of each pixel point, the current background white ratio corresponding to the current image is obtained, and when the current background white ratio is determined to be within the predetermined adjustment range, according to the current background white
  • the ratio reduces the white grayscale value in the four-color sub-pixel data corresponding to the current image and outputs the reduced white grayscale value to the display panel.
  • the present invention can improve the brightness of the display panel including the RGBW sub-pixel unit when displaying a solid color picture, so that the problem of darkness does not occur when displaying a solid color picture.

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Abstract

一种显示面板的驱动方法及驱动装置。该驱动方法包括：获取当前图像中各像素点的三色子像素数据（S101）；根据各像素点的三色子像素数据获取各像素点对应的饱和度（S102）；根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比（S103）；判断当前背景白占比是否在预定范围内（S104），若当前背景白占比在预定调整范围内，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值输出至显示面板（S105）。通过上述方式，能够提高包括RGBW子像素单元的显示面板在显示纯色画面时的亮度，使得显示纯色画面时不会出现偏暗的问题。

Description

一种显示面板的驱动方法及驱动装置 【技术领域】
本发明涉及液晶显示领域，特别涉及一种显示面板的驱动方法及驱动装置。
【背景技术】
目前，RGB显示面板上包括像素单元阵列，像素单元阵列中的每个像素单元可包括R(Red，红色)、G(Green，绿色)、B(Blue，蓝色)三种子像素单元。随着技术的发展，像素单元阵列中的每个像素单元除了包括R、G、B三种子像素单元外，还可包括W(White，白色)子像素单元，从而形成了RGBW显示面板。通过加入W子像素，可以使像素单元具备高穿透率，从而能够节省显示面板的功耗。然而，由于RGBW显示面板引入W像素单元，而R、G、B、W四个子像素单元的大小与原来RGB显示面板中R、G、B六个子像素单元的大小相等，也就是说，单位面积内，RGBW显示面板中R、G、B、W子像素单元的面积分别为1/4，而RGB显示面板中R、G、B子像素单元的面积分别为1/3，从而使得RGBW显示面板中R、G、B三个子像素单元的开口率为常规RGB显示面板的75％，在显示纯色画面时，RGBW显示面板的整体亮度会低于RGB显示面板，显示画面偏暗。另外，由于RGBW显示面板引入W像素单元，W像素单元的引入导致画面的对比度增强，根据人眼的视觉特性，在较强的对比度的情况下，人眼看纯色画面会感觉比较暗。
【发明内容】
本发明主要解决的技术问题是提供一种显示面板的驱动方法及驱动装置，能够改善包括RGBW子像素单元的显示面板在显示纯色画面时亮度偏暗的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种显示面板的驱动方法，该驱动方法包括：获取当前图像中各像素点的三色子像素数据； 根据各像素点的三色子像素数据获取各像素点对应的饱和度；根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比，其中，当前背景白占比为当前图像中饱和度和三色子像素数据满足预定条件的像素点与总像素点的比值；判断当前背景白占比是否在预定调整范围内；若当前背景白占在预定调整范围内，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值至显示面板；其中，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值的步骤包括：根据预定的背景白占比与增益系数的对应关系获取当前背景白占比对应的当前增益系数；根据当前增益系数降低当前图像对应的四色子像素数据中的白色灰阶值；其中，判断当前背景白占比是否在预定调整范围内的步骤包括：判断当前背景白占比是否大于第一预定值；其中，当当前背景白占比大于第一预定值，则判定当前背景白占比在预定调整范围内。
其中，三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1，根据各像素点的三色子像素数据获取各像素点对应的饱和度的步骤包括：
各像素点对应的饱和度根据如下公式进行计算：
Figure PCTCN2017070531-appb-000001
其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
其中，根据各像素点的三色子像素数据和饱和度获取当前图像对应的背景白占比的步骤包括：获取三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；在第一像素点集合中获取饱和度小于第三预定值的像素点的集合记为第二像素点集合；获取第二像素点集合中像素点的数目记为第一数目；获取当前图像中像素点的总数目记为第二数目；其中，背景白占比为第一数目与第二数目的比值。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种显示面 板的驱动方法，该驱动方法包括：获取当前图像中各像素点的三色子像素数据；根据各像素点的三色子像素数据获取各像素点对应的饱和度；根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比，其中，当前背景白占比为当前图像中饱和度和三色子像素数据满足预定条件的像素点与总像素点的比值；判断当前背景白占比是否在预定调整范围内；若当前背景白占在预定调整范围内，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值至显示面板。
其中，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值的步骤包括：根据预定的背景白占比与增益系数的对应关系获取当前背景白占比对应的当前增益系数；根据当前增益系数降低当前图像对应的四色子像素数据中的白色灰阶值。
其中，判断当前背景白占比是否在预定调整范围内的步骤包括：判断当前背景白占比是否大于第一预定值；其中，当当前背景白占比大于第一预定值，则判定当前背景白占比在预定调整范围内。
其中，三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1，根据各像素点的三色子像素数据获取各像素点对应的饱和度的步骤包括：
各像素点对应的饱和度根据如下公式进行计算：
Figure PCTCN2017070531-appb-000002
其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
其中，根据各像素点的三色子像素数据和饱和度获取当前图像对应的背景白占比的步骤包括：获取三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；在第一像素点集合中获取饱和度小于第三预定值的像素点的集合记为第二像素点集合；获取第二像素点集合中像素点的数目记为第一数目；获取当前图像中像素点的总数目记为第二数目；其中， 背景白占比为第一数目与第二数目的比值。
为解决上述技术问题，本发明采用的再一个技术方案是：提供一种显示面板的驱动装置，该驱动装置包括：第一获取模块，用于获取当前图像中各像素点的三色子像素数据；第二获取模块，与第一获取模块连接，用于根据第一获取模块获取的各像素点的三色子像素数据获取各像素点对应的饱和度；第三获取模块，分别与第一获取模块和第二获取模块连接，用于根据第一获取模块获取的各像素点的三色子像素数据和第二获取模块获取的饱和度获取当前图像对应的当前背景白占比，其中，当前背景白占比为当前图像中饱和度和三色子像素数据满足预定条件的像素点与总像素点的比值；判断模块，与第三获取模块连接，用于判断第三获取模块获取的当前背景白占比是否在预定调整范围内；处理模块，与判断模块连接，用于当判断模块判断当前背景白占比在预定调整范围内时，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值至显示面板。
其中，处理模块包括：获取单元，用于根据预定的背景白占比与增益系数的对应关系获取当前背景白占比对应的当前增益系数；处理单元，与获取单元连接，用于根据获取单元获取的当前增益系数降低当前图像对应的四色子像素数据中的白色灰阶值。
其中，判断模块判断当前背景白占比是否在预定调整范围内的操作具体为：判断模块判断当前背景白占比是否大于第一预定值；其中，当判断模块判断当前背景白占比大于第一预定值时，则判定背景白占比在预定调整范围内。
其中，三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1，各像素点对应的饱和度根据如下公式进行计算：
Figure PCTCN2017070531-appb-000003
其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
其中，第三获取模块根据各像素点的三色子像素数据和饱和度获取当前图像对应的背景白占比的操作包括：第三获取模块获取三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；在第一像素点集合中获取饱和度小于第三预定值的像素点的集合记为第二像素点集合；获取第二像素点集合中像素点的数目记为第一数目；获取当前图像中像素点的总数目记为第二数目；其中，背景白占比为第一数目与第二数目的比值。
本发明的有益效果是：区别于现有技术，本发明的显示面板的驱动方法及驱动装置通过获取当前图像中各像素点的三色子像素数据，根据各像素点的三色子像素数据获取各像素点对应的饱和度，根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比，当判定当前背景白占比在预定调整范围内时，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值至显示面板。通过上述方式，本发明能够提高包括RGBW子像素单元的显示面板在显示纯色画面时的亮度，使得显示纯色画面时不会出现偏暗的问题。
【附图说明】
图1是本发明实施例的显示面板的驱动方法的流程示意图；
图2是本发明实施例的背景白占比和增益系数的曲线示意图；
图3是本发明实施例的显示面板的驱动装置的结构示意图。
【具体实施方式】
在说明书及权利要求书当中使用了某些词汇来指称特定的组件，所属领域中的技术人员应可理解，制造商可能会用不同的名词来称呼同样的组件。本说明书及权利要求书并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的基准。下面结合附图和实施例对本发明进行详细说明。
图1是本发明实施例的显示面板的驱动方法的流程示意图。需注意的是， 若有实质上相同的结果，本发明的方法并不以图1所示的流程顺序为限。如图1所示，该方法包括如下步骤：
步骤S101：获取当前图像中各像素点的三色子像素数据。
在步骤S101中，三色子像素数据分别包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1。
步骤S102：根据各像素点的三色子像素数据获取各像素点对应的饱和度。
在步骤S102中，各像素点对应的饱和度根据如下公式进行计算：
Figure PCTCN2017070531-appb-000004
其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
步骤S103：根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比。
在步骤S103中，背景白占比为当前图像中饱和度和三色子像素数据满足预定条件的像素点与总像素点的比值。
在本实施例中，预定条件具体为：该像素点的红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的任意一个灰阶值大于第二预定值，同时，该像素点的饱和度小于第三预定值。优选地，第二预定值为150，第三预定值为0.2。
换个角度来说，在本实施例中，根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比的步骤具体为：获取三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；在第一像素点集合中获取饱和度小于第三预定值的像素点的集合记为第二像素点集合；获取第二像素点集合中像素点的数目记为第一数目；获取当前图像中像素点的总数目记为第二数目；其中，背景白占比为第一数目与第二数目的比值。
本领域的技术人员可以理解，白色饱和度为0，背景白可以理解为饱和度值低于一定阈值的纯色的像素点。
步骤S104：判断当前背景白占比是否在预定调整范围内，若当前背景白占比在预定调整范围内，则执行步骤S105，否则执行步骤S106。
在步骤S104中，在本实施例中，判断当前背景白占比是否在预定调整范围内的步骤具体为：判断当前背景白占比是否大于第一预定值。当前背景白占比大于第一预定值时，则说明当前图像具有低饱和度背景，则执行步骤S105。当背景白占比小于等于第一预定值时，则说明当前图像为高饱和度纯色画面，则执行步骤S106。
步骤S105：根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值至显示面板。
在步骤S105中，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值的步骤包括：根据预定的背景白占比与增益系数的对应关系获取当前背景白占比对应的当前增益系数；根据当前增益系数降低当前图像对应的四色子像素数据中的白色灰阶值。
请一并参考图2，图2是本发明实施例的背景白占比和增益系数的曲线示意图。如图2所示，横轴W-ratio表示背景白占比，其取值范围为0到1，纵轴W-gain表示增益系数，其取值范围为0到1。X1为第一预定值，X2为第四预定值。
其中，当背景白占比较小时(也即小于等于第一预定值X1时)，当前画面为高饱和度纯色画面，此时增益系数趋于为1，执行步骤S106，不需要进行背景调暗的处理。当背景白占比较多时(也即大于第一预定值X1)，当前图像具有低饱和度背景，执行步骤S105，根据增益系数进行背景调暗的处理。
本领域的技术人员可以理解，当背景白占比很多时(也即大于等于第四预定值)，虽然当前图像具有低饱和度背景，但是当前图像是比较亮的画面且纯色较少，此时增益系数趋于为1，也可以不进行背景调暗的处理。
因此，在其它实施例中，判断当前背景白占比是否在预定调整范围内的步骤也可以为：判断当前背景白占比是否在第一预定值和第四预定值所确定的预 定调整范围内，其中，第四预定值大于第一预定值。若当前背景白占比在第一预定值和第四预定值所确定的预定调整范围内时，也即当前白背景占比大于第一预定值X1且小于第四预定值X2时，则执行步骤S105，否则执行步骤S106。
本领域的技术人员可以理解，图2所示的背景白占比和增益系数的曲线仅为举例，本发明不以此为限。
在本实施例中，根据当前增益系数降低当前图像对应的四色子像素数据中的白色灰阶值的步骤具体为：将当前增益系数乘以四色子像素数据中的白色灰阶值作为降低后的白色灰阶值。本领域的技术人员可以理解，由于当前增益系数的取值在0至1之间，将四色子像素中的白色灰阶值乘以当前增益系数会使得白色灰阶值减小也即将当前图像的背景相比原来的调暗，从而实现当当前背景白占比在预定调整范围时，降低人眼因画面高对比度导致纯色偏暗的感觉，有效改善RGBW显示面板纯色偏暗的问题。
另外，当前图像对应的四色子像素数据是根据各像素点的三色子像素数据获取得到。具体来说，根据各像素点的三色子像素数据获取对应的四色子像素数据的步骤包括：
四色子像素数据根据如下公式进行计算：
W2＝Min(R1、G1、B1)；
G2＝G1*Gain-W2；
R2＝R1*Gain-W2；
B2＝B1*Gain-W2；
其中，四色子像素数据分别包括红色灰阶值R2、绿色灰阶值G2、蓝色灰阶值B2和白色灰阶值W2；三色子像素数据为已知值，其分别包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1；Gain为预定增益值；Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
步骤S106：保持当前图像对应的四色子像素中的白色灰阶值不变并输出至显示面板。
在步骤S106中，当当前背景白占比不在预定调整范围内时，则保持当前图像对应的四色子像素中的白色灰阶值不变并输出至显示面板。
图3是本发明实施例的显示面板的驱动装置的结构示意图。如图3所示，该驱动装置包括第一获取模块21、第二获取模块22、第三获取模块23、判断模块24和处理模块25。
第一获取模块21用于获取当前图像中各像素点的三色子像素数据。其中，三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1。
第二获取模块22与第一获取模块21连接，用于根据第一获取模块21获取的各像素点的三色子像素数据获取各像素点对应的饱和度。
在本实施例中，各像素点对应的饱和度根据如下公式进行计算：
Figure PCTCN2017070531-appb-000005
其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
第三获取模块23分别与第一获取模块21和第二获取模块22连接，用于根据第一获取模块21获取的各像素点的三色子像素数据和第二获取模块22获取的饱和度获取当前图像对应的当前背景白占比，其中，当前背景白占比为当前图像中饱和度和三色子像素数据满足预定条件的像素点与总像素点的比值。
在本实施例中，第三获取模块23根据各像素点的三色子像素数据和饱和度获取当前图像对应的背景白占比的操作包括：第三获取模块23获取三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；在第一像素点集合中获取饱和度小于第三预定值的像素点的集合记为第二像素点集合；获取第二像素点集合中像素点的数目记为第一数目；获取当前图像中像素点的总数目记为第二数目；其中，背景白占比为第一数目与第二数目的比值。
判断模块24与第三获取模块23连接，用于判断第三获取模块23获取的当 前背景白占比是否在预定调整范围内。
在本实施例中，判断模块24判断当前背景白占比是否在预定调整范围内的操作具体为：判断模块24判断当前背景白占比是否大于第一预定值；其中，当判断模块24判断当前背景白占比大于第一预定值时，则判定背景白占比在预定调整范围内。
处理模块25与判断模块24连接，用于当判断模块24判断当前背景白占比在预定调整范围内时，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值至显示面板。
具体来说，处理模块25包括获取单元251和处理单元252。获取单元251与判断模块24连接，用于当判断模块24判断当前背景白占比在预定调整范围内时，根据预定的背景白占比与增益系数的对应关系获取当前背景白占比对应的当前增益系数。处理单元252与获取单元251连接，用于根据获取单元2551获取的当前增益系数降低当前图像对应的四色子像素数据中的白色灰阶值。
本发明的有益效果是：区别于现有技术，本发明的显示面板的驱动方法及驱动装置通过获取当前图像中各像素点的三色子像素数据，根据各像素点的三色子像素数据获取各像素点对应的饱和度，根据各像素点的三色子像素数据和饱和度获取当前图像对应的当前背景白占比，当判断当前背景白占比在预定调整范围内时，根据当前背景白占比降低当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的白色灰阶值输出至显示面板。通过上述方式，本发明能够提高包括RGBW子像素单元的显示面板在显示纯色画面时的亮度，使得显示纯色画面时不会出现偏暗的问题。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种显示面板的驱动方法，其中，所述驱动方法包括：
    获取当前图像中各像素点的三色子像素数据；
    根据各像素点的所述三色子像素数据获取各像素点对应的饱和度；
    根据各像素点的所述三色子像素数据和所述饱和度获取所述当前图像对应的当前背景白占比，其中，所述当前背景白占比为所述当前图像中所述饱和度和所述三色子像素数据满足预定条件的像素点与总像素点的比值；
    判断所述当前背景白占比是否在预定调整范围内；
    若所述当前背景白占在预定调整范围内，根据所述当前背景白占比降低所述当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的所述白色灰阶值至显示面板；
    其中，所述根据所述当前背景白占比降低所述当前图像对应的四色子像素数据中的白色灰阶值的步骤包括：
    根据预定的背景白占比与增益系数的对应关系获取所述当前背景白占比对应的当前增益系数；
    根据所述当前增益系数降低所述当前图像对应的四色子像素数据中的白色灰阶值；
    其中，判断所述当前背景白占比是否在预定调整范围内的步骤包括：
    判断所述当前背景白占比是否大于第一预定值；
    其中，当所述当前背景白占比大于所述第一预定值时，则判定所述当前背景白占比在所述预定调整范围内。
  2. 根据权利要求1所述的驱动方法，其中，所述三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1，所述根据各像素点的所述三色子像素数据获取各像素点对应的饱和度的步骤包括：
    各像素点对应的饱和度根据如下公式进行计算：
    Figure PCTCN2017070531-appb-100001
    其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
  3. 根据权利要求1所述的驱动方法，其中，根据各像素点的所述三色子像素数据和所述饱和度获取当前图像对应的背景白占比的步骤包括：
    获取所述三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；
    在所述第一像素点集合中获取所述饱和度小于第三预定值的像素点的集合记为第二像素点集合；
    获取所述第二像素点集合中像素点的数目记为第一数目；
    获取所述当前图像中像素点的总数目记为第二数目；
    其中，所述背景白占比为所述第一数目与所述第二数目的比值。
  4. 一种显示面板的驱动方法，其中，所述驱动方法包括：
    获取当前图像中各像素点的三色子像素数据；
    根据各像素点的所述三色子像素数据获取各像素点对应的饱和度；
    根据各像素点的所述三色子像素数据和所述饱和度获取所述当前图像对应的当前背景白占比，其中，所述当前背景白占比为所述当前图像中所述饱和度和所述三色子像素数据满足预定条件的像素点与总像素点的比值；
    判断所述当前背景白占比是否在预定调整范围内；
    若所述当前背景白占在预定调整范围内，根据所述当前背景白占比降低所述当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的所述白色灰阶值至显示面板。
  5. 根据权利要求4所述的驱动方法，其中，所述根据所述当前背景白占比降低所述当前图像对应的四色子像素数据中的白色灰阶值的步骤包括：
    根据预定的背景白占比与增益系数的对应关系获取所述当前背景白占比对 应的当前增益系数；
    根据所述当前增益系数降低所述当前图像对应的四色子像素数据中的白色灰阶值。
  6. 根据权利要求4所述的驱动方法，其中，判断所述当前背景白占比是否在预定调整范围内的步骤包括：
    判断所述当前背景白占比是否大于第一预定值；
    其中，当所述当前背景白占比大于所述第一预定值时，则判定所述当前背景白占比在所述预定调整范围内。
  7. 根据权利要求4所述的驱动方法，其中，所述三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1，所述根据各像素点的所述三色子像素数据获取各像素点对应的饱和度的步骤包括：
    各像素点对应的饱和度根据如下公式进行计算：
    Figure PCTCN2017070531-appb-100002
    其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
  8. 根据权利要求4所述的驱动方法，其中，根据各像素点的所述三色子像素数据和所述饱和度获取当前图像对应的背景白占比的步骤包括：
    获取所述三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；
    在所述第一像素点集合中获取所述饱和度小于第三预定值的像素点的集合记为第二像素点集合；
    获取所述第二像素点集合中像素点的数目记为第一数目；
    获取所述当前图像中像素点的总数目记为第二数目；
    其中，所述背景白占比为所述第一数目与所述第二数目的比值。
  9. 一种显示面板的驱动装置，其中，所述驱动装置包括：
    第一获取模块，用于获取当前图像中各像素点的三色子像素数据；
    第二获取模块，与所述第一获取模块连接，用于根据所述第一获取模块获取的各像素点的所述三色子像素数据获取各像素点对应的饱和度；
    第三获取模块，分别与所述第一获取模块和所述第二获取模块连接，用于根据所述第一获取模块获取的各像素点的所述三色子像素数据和所述第二获取模块获取的所述饱和度获取所述当前图像对应的当前背景白占比，其中，所述当前背景白占比为所述当前图像中所述饱和度和所述三色子像素数据满足预定条件的像素点与总像素点的比值；
    判断模块，与所述第三获取模块连接，用于判断所述第三获取模块获取的所述当前背景白占比是否在预定调整范围内；
    处理模块，与所述判断模块连接，用于当所述判断模块判断所述当前背景白占比在预定调整范围内时，根据所述当前背景白占比降低所述当前图像对应的四色子像素数据中的白色灰阶值并输出降低后的所述白色灰阶值输出至显示面板。
  10. 根据权利要求9所述的驱动装置，其中，所述处理模块包括：
    获取单元，用于根据预定的背景白占比与增益系数的对应关系获取所述当前背景白占比对应的当前增益系数；
    处理单元，与所述获取单元连接，用于根据所述获取单元获取的所述当前增益系数降低所述当前图像对应的四色子像素数据中的白色灰阶值。
  11. 根据权利要求9所述的驱动装置，其中，所述判断模块判断所述当前背景白占比是否在预定调整范围内的操作具体为：
    所述判断模块判断所述当前背景白占比是否大于第一预定值；
    其中，当所述判断模块判断所述当前背景白占比大于所述第一预定值时，则判定所述背景白占比在所述预定调整范围内。
  12. 根据权利要求9所述的驱动装置，其中，所述三色子像素数据包括红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1，各像素点对应的饱和度根据如 下公式进行计算：
    Figure PCTCN2017070531-appb-100003
    其中，s为饱和度，Max(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最大值，Min(R1、G1、B1)为红色灰阶值R1、绿色灰阶值G1和蓝色灰阶值B1中的最小值。
  13. 根据权利要求9所述的驱动装置，其中，所述第三获取模块根据各像素点的所述三色子像素数据和所述饱和度获取当前图像对应的背景白占比的操作包括：
    所述第三获取模块获取所述三色子像素数据中任意颜色的灰阶值大于第二预定值的像素点的集合记为第一像素点集合；在所述第一像素点集合中获取所述饱和度小于第三预定值的像素点的集合记为第二像素点集合；获取所述第二像素点集合中像素点的数目记为第一数目；获取所述当前图像中像素点的总数目记为第二数目；其中，所述背景白占比为所述第一数目与所述第二数目的比值。
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