WO2019114480A1 - 多基色转换方法、显示面板的驱动方法及驱动装置、和显示设备 - Google Patents

多基色转换方法、显示面板的驱动方法及驱动装置、和显示设备 Download PDF

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WO2019114480A1
WO2019114480A1 PCT/CN2018/115193 CN2018115193W WO2019114480A1 WO 2019114480 A1 WO2019114480 A1 WO 2019114480A1 CN 2018115193 W CN2018115193 W CN 2018115193W WO 2019114480 A1 WO2019114480 A1 WO 2019114480A1
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color
target
primary
gray
primary colors
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PCT/CN2018/115193
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English (en)
French (fr)
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习艳会
代斌
张小牤
牛海军
彭宽军
李小龙
王冬辉
孙炎
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京东方科技集团股份有限公司
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Priority to US16/337,741 priority Critical patent/US11308844B2/en
Publication of WO2019114480A1 publication Critical patent/WO2019114480A1/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
    • G09G3/2003—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
    • 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
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a multi-primary color conversion method, a driving method and apparatus for driving a display panel, and a display device.
  • the display panel of the three primary colors red, green, blue
  • the color coordinates (x, y) and the luminance information Y of the target color are known
  • the mutual conversion relationship between CIE1931RGB, CIE1931XYZ, and CIE1931xyY can be easily obtained.
  • the stimulus values of the three primary colors are obtained, so that the red, green and blue pixels are provided with corresponding signals according to the stimulation values of the three primary colors to display the desired target color.
  • the present disclosure provides a multi-primary color conversion method, a driving method and driving device for driving a display panel, and a display device to facilitate accurate conversion of color information of a target color into gray scales of a plurality of primary colors.
  • the present disclosure provides a multi-primary color conversion method for converting color information of a target color to be displayed into target gray scales of a plurality of primary colors, the primary color type being greater than 3, and color information of the target color including the target color
  • the color coordinates (x 0 , y 0 ) and the target brightness (Y 0 ) the multi-primary color conversion method includes:
  • a spatial gamut model of the display panel in a CIE xyY color space according to all colors that can be displayed by the display panel, the spatial gamut model being surrounded by a plurality of peripheral surfaces and a xoy surface of the CIE xyY color space;
  • Each peripheral surface has a plurality of vertices such that a projection shape of the peripheral surface on the xoy plane is a polygon, and each vertex of the polygon represents a color at which the mixed color is at least one primary color is at a maximum Upper, the inner regions of the projections of the different peripheral faces on the xoy face have no overlap;
  • the reference gray scale of each primary color of the target color is converted into a target gray scale according to a proportional relationship between the reference brightness of the target color and the target brightness.
  • the plurality of primary colors are six primary colors; and a grayscale of each primary color of a color corresponding to each vertex of the target peripheral surface is obtained, and a reference grayscale of a part of the primary colors of the target color is obtained.
  • the step includes obtaining a reference grayscale of the four primary colors of the target color.
  • the step of acquiring the reference grayscale of the remaining primary colors of the target color and the reference luminance of the target color comprises:
  • Gray_R, Gray_G, Gray_B, Gray_YE, Gray_C, and Gray_M are: reference gray scales of four primary colors obtained according to gray levels of respective primary colors of colors corresponding to each vertex of the target peripheral surface; Two reference gray scales for the remaining two primary colors to be determined;
  • Xmax, Ymax, and Zmax constitute a tristimulus value corresponding to a color having a color coordinate of (x 0 , y 0 ) and a luminance of Ymax in the CIE XYZ system;
  • each element in the matrix is a preset constant.
  • the step of establishing a spatial gamut model of the display panel in the CIE xyY color space according to all colors that the display panel can display includes:
  • the color coordinates (x', y') and brightness Y' of the sample color displayed by the display panel are determined according to formula (1) and formula (2):
  • Gray_R', Gray_G', Gray_B', Gray_YE', Gray_C', and Gray_M' are sample gray scales of six primary colors respectively;
  • X', Y', and Z' constitute tristimulus values corresponding to sample colors in the CIE XYZ system. ;
  • a conversion matrix between the gray color of the six primary colors and the tristimulus value in the CIE XYZ system, each element in the matrix is a preset constant;
  • the spatial gamut model of the display panel is established in the CIE xyY color space based on the color coordinates and brightness of all sample colors.
  • the step of acquiring a reference grayscale of a part of the primary colors of the target color according to the grayscale of each primary color of the color corresponding to each vertex of the target peripheral surface comprises:
  • Obtaining a six-primary gray scale corresponding to a color of each vertex of the target peripheral surface wherein a gray scale of the color corresponding to each vertex of the target peripheral surface of the L1 primary color is a maximum value of the preset gray scale range, L2
  • the reference grayscale of the corresponding primary color in the target color is determined as Determining a maximum value of the preset grayscale range; when the grayscale of the primary color in the corresponding color of each vertex is the minimum value of the preset grayscale range, determining the reference grayscale of the corresponding primary color in the target color as the The minimum value of the preset grayscale range.
  • the preset gray scale ranges from 0 to 1; or the preset gray scale ranges from 0 to 2 n -1, and n is an integer greater than 1.
  • the peripheral surface has four vertices such that the projection shape of the peripheral surface on the xoy surface of the CIE xyY color space is a quadrangle;
  • the step of determining the target peripheral surface corresponding to the target color comprises:
  • the color coordinates (x 1 , y 1 ), (x 2 , y 2 ), (x 3 , y 3 ), and (x 4 , y 4 ) of the color corresponding to each vertex of the peripheral face are obtained, And calculate the values of a, b, c, d according to the following formula:
  • the peripheral surface is the target peripheral surface corresponding to the target color.
  • the step of converting the reference gray level of each of the primary colors of the target color to the target gray level according to the proportional relationship between the reference brightness of the target color and the target brightness comprises:
  • the product of the reference gray level of the primary color and the scaling factor is obtained, and the obtained product is used as the target gray level of the primary color.
  • the plurality of primary colors include red, green, blue, yellow, cyan, and magenta.
  • the present disclosure further provides a driving method for driving a display panel to display an image to be displayed, the display panel including a plurality of display pixel units, each of the display pixel units including a sub-display pixel unit having a plurality of primary colors, and a plurality of primary colors
  • the driving method includes:
  • color information of a target color of each display pixel unit is converted into gray scales of a plurality of primary colors, and color information of the target color includes color coordinates and target brightness of the target color;
  • Corresponding driving signals are provided for each image pixel unit of the display panel according to gray scales of the plurality of primary colors, so that the respective image pixel units of the display panel display the target color.
  • the present disclosure also provides a driving apparatus for driving a display panel, the display panel including a plurality of display pixel units, each of the display pixel units including a sub-display pixel unit having a plurality of primary colors, the plurality of primary color types being greater than 3, wherein the driving device comprises a processor, and a memory for storing at least one program; wherein, when the at least one program is executed by the at least one processor, causing the at least one processor to perform according to The above driving method of the present disclosure. .
  • the present disclosure also provides a display device including a display panel and the above-described driving device for driving the display panel, the display panel including a plurality of display pixel units, each of the display pixel units including a sub-display having a plurality of primary colors
  • the pixel unit has more than three types of basic colors.
  • the plurality of sub-display pixel units include a red sub-display pixel unit, a green sub-display pixel unit, a blue sub-display pixel unit, a cyan sub-display pixel unit, a yellow sub-display pixel unit, and a magenta sub-display pixel. unit.
  • FIG. 1 is a flow chart of a multi-primary color conversion method provided in an embodiment of the present disclosure
  • FIG. 2 is another flow chart of a multi-primary color conversion method provided in an embodiment of the present disclosure
  • Figure 3a is a spatial gamut model of the display panel
  • Figure 3b is a projection distribution of the peripheral faces of the spatial gamut model on the xoy face.
  • the requirements for the resolution and performance of the display screen are getting higher and higher, resulting in an increase in the power consumption of the screen and an increase in the amount of data transmission; and the display capability of the existing three primary color display panels. Limited, can only display a certain range of colors.
  • some manufacturers have proposed a six-primary display panel, but when driving the display of the six-primary display panel, it is impossible to The color information of the target color (i.e., color coordinates and brightness) is accurately converted into gray scales of six primary colors, so that it is difficult to accurately display the target color by the six primary color display panel.
  • the target color is obtained by a conversion relationship between the gray color of the three primary colors and the color information (see the following formula (0-1) and formula (0-2)).
  • the color information (including the color coordinates x 0 , y 0 and the target brightness Y 0 ) is converted into the gray levels Gray_R 0 , Gray_G 0 and Gray_B 0 of the three primary colors:
  • X 0 , Y 0 and Z 0 are tristimulus values corresponding to the target color in the CIE XYZ system (ie CIE1931 XYZ system), and Y 0 is also the target brightness of the target color;
  • a conversion matrix between the three primary gray scales and the tristimulus values in the CIE XYZ system for the display panel wherein X R , X G , and X B respectively convert the grayscales Gray_R 0 , Gray_G 0 , and Gray_B 0 of the three primary colors
  • Y R , Y G and Y B are the conversion coefficients of the three primary colors when the gray scales Gray_R 0 , Gray_G 0 and Gray_B 0 of the three primary colors are converted into the stimulation value B 0 , respectively.
  • Z R , Z G , and Z B are conversion coefficients of the three primary colors when the gray scales Gray_R 0 , Gray_G 0 , and Gray_B 0 of the three primary colors are converted into the stimulation value Z 0 , respectively. It should be understood that the values of the elements in the matrix are all predetermined constants.
  • the values of X 0 and Z 0 are first obtained according to the formula (0-2), and X 0 , Y 0 and Z 0 are obtained.
  • the value is substituted into the formula (0-1), so that three equations for the three gray scales to be calculated can be obtained according to the formula (0-1), thereby obtaining unique values of the gray levels of the three primary colors.
  • the type of the primary color of the display panel is increased by more than 3, three equations for the gray level of the multiple primary colors are obtained, wherein the number of unknowns is greater than 3, so that the gray scale of each primary color cannot be accurately obtained, that is, the target cannot be accurately obtained.
  • the color information of the color is converted into a gray scale of a multi-primary color.
  • the present disclosure provides a multi-primary color conversion method for converting the color information of the target color to be displayed into multiple a target gray scale of the primary color, the primary color type being greater than 3, and the color information of the target color includes a color coordinate and a target brightness of the target color.
  • the multi-primary color conversion method includes the following steps S1 to S5:
  • the spatial gamut model 60 is a plurality of peripheral faces and a xoy face of the CIE xyY color space; each peripheral face has a plurality of vertices, and a projection of each peripheral face on the xoy is as shown in FIG. 3b, and the peripheral face is on the xoy face
  • the projected shape is a polygon, and the inner regions of the projections of the different peripheral faces on the xoy face are not overlapped.
  • the inner regions of the projections of the different peripheral faces on the xoy face are not overlapped herein means that a part of the boundaries of the two peripheral faces may coincide, but the regions within the boundaries do not overlap.
  • the color is described by the luminance and color coordinates (x, y).
  • the point whose position coordinate is (a, b, c) indicates that the color coordinate is (a) , b), the color of the brightness c.
  • the corresponding point can be found in the CIE xyY space.
  • S2 Determine a target peripheral surface corresponding to the target color according to a color coordinate of the target color and a color coordinate of a color corresponding to each vertex of each of the peripheral surfaces.
  • the target peripheral surface corresponding to the target color refers to a peripheral surface into which the point corresponding to the target color can fall in a direction perpendicular to the xoy plane. That is, the orthographic projection of the point corresponding to the target color on the xox plane is located within the orthographic projection range of the target peripheral surface on the xox plane.
  • the “gray scale” in the present disclosure may be a gray scale value that is not normalized (for example, the gray scale is between 0 and 255), or may be a normalized gray scale value. (ie, the gray level is between 0 and 1).
  • the color coordinates of the target color are the same as the color coordinates of the color corresponding to the projection point on the target peripheral surface of the point corresponding to the target color, and a part of the basic color gray scale of each color corresponding to each point on the target peripheral surface is A part of the primary color gray scales of the colors corresponding to the vertices of the target peripheral surface are the same. Therefore, the reference gray scale of a part of the primary colors of the target color can be obtained according to the gray scale of each primary color of the color corresponding to each vertex of the target peripheral surface. For example, when the color of each vertex of the target peripheral surface is 0, the red gray level is 0, then the red gray level of the color corresponding to each point on the peripheral surface of the target is 0, so that the target color is red.
  • the reference gray scale is determined to be 0.
  • the gray scale of a part of the primary colors is first determined by using the spatial gamut model 60, and therefore, according to the multi-primary gray scale and color information.
  • the number of unknowns is less than the number of primary colors, thereby facilitating the conversion of the color information of the target color to be displayed into the target grayscale of the plurality of primary colors.
  • the multi-primary color conversion method of the present disclosure is particularly suitable for converting color information of a target color into gray scales of six primary colors, which are red (R), green (G), blue (B), yellow (Y), respectively. Cyan (C) and Magenta (M).
  • the multi-primary color conversion method of the present disclosure will be described in detail below by taking the six primary colors as an example.
  • the multi-primary device method includes the following steps S1 to S5:
  • the spatial color gamut model 60 of the display panel is established in the CIE xyY color space according to all colors that can be displayed by the display panel. In practical applications, Matlab software can be used to draw all colors.
  • the spatial gamut model is surrounded by a plurality of peripheral faces and a xoy face of the CIE xyY color space; each peripheral face has four vertices such that a projection shape of the peripheral face on the xoy face is Quadrilateral, the vertices of each quadrilateral represent solid color points, so the points inside the quadrilateral can be matched by the four vertices.
  • the vertices of each quadriangle indicate which of the base colors is the maximum value, and the mixed color is located at the point.
  • the inner regions of the projections of the different peripheral faces on the xoy face do not overlap.
  • the step S1 includes the following steps S11 to S13:
  • the "gray scale” of the present disclosure may be a gray scale that has not been normalized. Accordingly, the preset gray scale range is 0 to 2 n -1, and n is an integer greater than 1. Specifically, n may be 8, and the preset gray scale ranges from 0 to 255.
  • the "gray scale" of the present disclosure may also be a normalized gray scale, and correspondingly, the preset gray scale range is 0 to 1.
  • Each set of gray scales of a set of six primary colors is determined according to formula (1) and formula (2), and color coordinates (x', y') and brightness Y' of the sample color displayed by the display panel are determined according to formula (1) and formula (2);
  • Gray_R', Gray_G', Gray_B', Gray_YE', Gray_C', and Gray_M' are sample gray scales of six primary colors, respectively.
  • X', Y', Z' constitute the tristimulus value corresponding to the sample color in the CIE XYZ system.
  • the conversion matrix between the six primary gray scales and the tristimulus values in the CIE XYZ system, each element in the matrix is a preset constant.
  • X R , X G , and X B , X YE , X C , and X M are conversion coefficients when the six primary colors are converted into the stimulation value X′; Y R , Y G , Y B , Y YE , Y C , and Y M are respectively converted into the stimulation values of the six primary colors.
  • the conversion coefficient at Y'; Z R , Z G , Z B , Z YE , Z C , and Z M are conversion coefficients when the six primary colors are converted into the stimulation value Z', respectively.
  • the spatial gamut model has 24 peripheral faces, each having four vertices.
  • the step S2 Determine a target peripheral surface corresponding to the target color according to a color coordinate of the target color and a color coordinate of a color corresponding to each vertex of each of the peripheral surfaces.
  • the projection of the point corresponding to the target color on the xox plane is the point P
  • the projections of the vertices of a certain peripheral surface on the xox plane are respectively O 1 , O 2 , O 3 and O 4 , if O 1
  • the peripheral faces determined by O 2 , O 3 and O 4 are the target peripheral faces, then the following four vector products Same number. Accordingly, as shown in FIG. 2, the step S2 includes:
  • the peripheral surface is the target peripheral surface corresponding to the target color.
  • the same numbers a, b, c, and d mean whether a, b, c, and d are positive at the same time or negative at the same time. It should be noted that when any one of a, b, c, and d is 0, it can be regarded as a positive sign or a negative sign. For example, when a, b, c, and d are both greater than or equal to 0, or both are less than or equal to 0, a, b, c, and d are considered to be the same.
  • step S3 Obtain a reference gray level of a part of the primary colors of the target color according to gray levels of respective primary colors of colors corresponding to each vertex of the target peripheral surface.
  • step S3 includes:
  • the reference grayscale of the corresponding primary color in the target color Determining a maximum value of the preset grayscale range; when the grayscale of the primary color in the corresponding color of each vertex is the minimum value of the preset grayscale range, the reference grayscale of the corresponding primary color in the target color It is determined as the minimum value of the preset gray scale range.
  • the preset gray scale range is 0 to 255.
  • the reference gray scale of the red color in the target color is also 255; if each vertex corresponds to the color If the green gray scale is 0, the green reference gray scale in the target color is also 0.
  • the sum of the number of primary color types whose gray scale reaches 255 and the number of primary color types whose gray scale is 0 are four, so that the reference of the four primary colors in the target color can be determined according to step S32. Grayscale.
  • the step S4 includes:
  • the reference gray scale and the target of the remaining two primary colors of the target color are determined according to the reference gray scale of the four primary colors of the target color obtained in step S3, the color coordinates (x 0 , y 0 ) of the target color, and the following formula (4).
  • Color reference brightness Ymax
  • Xmax, Ymax, and Zmax constitute a tristimulus value corresponding to a color having a color coordinate of (x 0 , y 0 ) and a luminance of Ymax in the CIE XYZ system;
  • the conversion matrix between the six primary gray scales and the tristimulus values in the CIE XYZ system, each element in the matrix is a preset constant.
  • X R , X G , X B , X YE , X C , and X M is the conversion coefficient when the six primary colors are converted into the stimulation value Xmax;
  • Y R , Y G , Y B , Y YE , Y C , Y M are the conversion coefficients when the six primary colors are converted into the stimulation value Ymax;
  • Z R , Z G , Z B , Z YE , Z C , and Z M are conversion coefficients when the six primary colors are converted into the stimulation value Zmax, respectively.
  • Xmax and Zmax can all be represented by an algebraic formula containing Ymax, and four of Gray_R, Gray_G, Gray_B, Gray_YE, Gray_C, and Gray_M are known, therefore, by using the above formula (4), three unknowns can be obtained. Three equations are obtained to obtain a unique solution for each primary color reference gray scale.
  • step S5 converting the reference gray scale of each primary color of the target color into a target gray scale according to a proportional relationship between the reference brightness of the target color and the target brightness. Specifically, as shown in FIG. 2, the step S5 includes:
  • the present disclosure further provides a driving method for driving a display panel to display an image to be displayed, the display panel including a plurality of display pixel units, each of the display pixel units including a sub-display pixel unit having a plurality of primary colors, and a plurality of primary colors
  • the driving method includes:
  • color information of a target color of each display pixel unit of an image to be displayed is converted into gray scales of a plurality of primary colors, and color information of the target color includes color coordinates of the target color And target brightness.
  • respective image pixel units of the display panel are provided with corresponding driving signals according to gray scales of the plurality of primary colors, so that the image pixel units of the display panel display the target color.
  • the driving method may also directly generate a driving signal according to the gray scale of each primary color, or may perform rendering processing on the gray scale of each primary color, and then generate a driving signal according to the gray scale after rendering.
  • the present disclosure also provides a computer readable storage medium having stored therein instructions for causing the computer to perform the multi-primary color display when the computer readable storage medium is run on a computer The driving method of the panel.
  • the present disclosure also provides a driving apparatus for driving a display panel, the display panel including a plurality of display pixel units, each of the display pixel units including a sub-display pixel unit having a plurality of primary colors, the plurality of primary color types being greater than 3, wherein the driving device comprises a processor, and a memory for storing at least one program; wherein, when the at least one program is executed by the at least one processor, causing the at least one processor to execute the present Disclose the above driving method
  • the present disclosure also provides a display device including a display panel and the above-described driving device for driving the display panel, the display panel including a plurality of display pixel units, each of the display pixel units including a sub-display having a plurality of primary colors
  • the pixel unit has more than three types of basic colors.
  • the plurality of sub-display pixel units include a red sub-display pixel unit, a green sub-display pixel unit, a blue sub-display pixel unit, a cyan sub-display pixel unit, a yellow sub-display pixel unit, and a magenta sub-display pixel unit.
  • the computer can be caused to perform the above-described driving method, thereby accurately obtaining the target gray scales of the six primary colors, and providing corresponding driving signals, and thus, when the computer readable storage medium When operating on the display device, the color actually displayed by the display device can be made closer to the target color, thereby improving the display effect.
  • the drive device for driving a display panel includes at least one processor such as a CPU, and a memory such as a ROM for storing at least one program. Wherein, when the at least one program is executed by the at least one processor, the at least one processor is caused to perform the aforementioned driving method for driving the display panel.
  • each unit or module involved in the embodiments of the present disclosure may be implemented by software, or may be implemented by hardware.
  • Each unit or module may be a software program disposed in the processor.
  • each unit or module may be a software program disposed in a computer or a mobile smart device; each unit or module may also be a separately configured hardware device.
  • the names of these units or modules do not constitute a limitation on the unit or module itself.

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Abstract

一种多基色转换方法，包括：建立显示面板的空间色域模型；根据目标颜色的色坐标以及每个***面各顶点所对应颜色的色坐标，确定目标颜色对应的目标***面；根据目标***面的各顶点所对应颜色的每种基色的灰阶，获取目标颜色的一部分基色的参考灰阶；获取目标颜色的其余基色的参考灰阶和目标颜色的参考亮度；根据目标颜色的参考亮度与目标亮度的比例关系，将目标颜色的每种基色的参考灰阶分别转换为目标灰阶。相应地，一种显示面板的驱动方法及驱动装置和显示设备，能够准确地将目标颜色的色彩信息转换为多种基色的目标灰阶。

Description

多基色转换方法、显示面板的驱动方法及驱动装置、和显示设备
相关申请的交叉引用
本申请要求2017年12月13日提交的申请号为CN201711327189.5的中国专利申请的优先权，该申请的全部内容在此以引用方式整体并入。
技术领域
本公开涉及显示技术领域，具体涉及一种多基色转换方法、用于驱动显示面板的驱动方法及装置、和显示设备。
背景技术
在三基色(红、绿、蓝)显示面板进行显示时，当已知目标颜色的色坐标(x，y)和亮度信息Y时，根据CIE1931RGB、CIE1931XYZ以及CIE1931xyY之间的相互转换关系可以轻松求得三基色的刺激值，从而根据三基色的刺激值为红绿蓝像素提供相应的信号，以显示所需的目标颜色。
发明内容
本公开提供了一种多基色转换方法、驱动显示面板的驱动方法及驱动装置、和显示设备，以有利于将目标颜色的色彩信息准确地转换为多基色的灰阶。
本公开提供一种多基色转换方法，用于将待显示的目标颜色的色彩信息转换为多种基色的目标灰阶，所述基色种类大于3，所述目标颜色的色彩信息包括所述目标颜色的色坐标(x 0，y 0)和目标亮度(Y 0)，所述多基色转换方法包括：
根据显示面板所能够显示的所有颜色，在CIE xyY色空间中建立所述显示面板的空间色域模型，该空间色域模型由多个***面和所述CIE xyY色空间的xoy面围成；每个***面具有多个顶点，以使 所述***面在所述xoy面上的投影形状为多边形，所述多边形的每个顶点表示至少一种基色为最大值时混合得到的颜色位于该点上，不同***面在所述xoy面上的投影的内部区域无重叠；
根据所述目标颜色的色坐标以及每个***面各顶点所对应颜色的色坐标，确定所述目标颜色对应的目标***面；
根据所述目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶；
根据获得的所述目标颜色的一部分基色的参考灰阶以及目标颜色的各基色灰阶与目标颜色的参考亮度、色坐标之间的关系，获取所述目标颜色的其余基色的参考灰阶和所述目标颜色的参考亮度；以及
根据所述目标颜色的参考亮度与目标亮度的比例关系，将所述目标颜色的每种基色的参考灰阶分别转换为目标灰阶。
在一个实施例中，所述多种基色为六种基色；以及根据所述目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶的步骤包括获取所述目标颜色的四种基色的参考灰阶。
在一个实施例中，获取所述目标颜色的其余基色的参考灰阶和目标颜色的参考亮度的步骤包括：
根据获得的所述目标颜色的四种基色的参考灰阶、所述目标颜色的色坐标(x 0，y 0)和以下公式，确定所述目标颜色的其余两种基色的参考灰阶和所述目标颜色的参考亮度Ymax：
Figure PCTCN2018115193-appb-000001
其中，Gray_R、Gray_G、Gray_B、Gray_YE、Gray_C、Gray_M中的四个为：根据所述目标***面的每个顶点所对应颜色的各基色的灰阶所获得的四种基色的参考灰阶；其余两个为待确定的其余两种基色的参考灰阶；
Xmax、Ymax、Zmax构成了CIE XYZ***中与色坐标为(x 0，y 0)、亮度为Ymax的颜色对应的三刺激值；并且，
Figure PCTCN2018115193-appb-000002
Figure PCTCN2018115193-appb-000003
Figure PCTCN2018115193-appb-000004
为显示面板将六基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，该矩阵中的各元素均为预设常数。
在一个实施例中，根据显示面板所能够显示的所有颜色，在CIE xyY色空间中建立所述显示面板的空间色域模型的步骤包括：
设置多组六基色的样本灰阶，每种基色的样本灰阶的取值范围均在预设灰阶范围内；
每设置一组六基色的样本灰阶，均根据公式(1)和公式(2)确定显示面板所显示的样本颜色的色坐标(x‘，y’)和亮度Y’：
Figure PCTCN2018115193-appb-000005
Figure PCTCN2018115193-appb-000006
其中，Gray_R’、Gray_G’、Gray_B’、Gray_YE’、Gray_C’、Gray_M’分别为六基色的样本灰度；X’、Y’、Z’构成了CIE XYZ***中与样本颜色对应的三刺激值；
Figure PCTCN2018115193-appb-000007
为显示面板将六基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，该矩阵中的各元素均为预设常数；
根据所有样本颜色的色坐标和亮度在所述CIE xyY色空间中建 立所述显示面板的空间色域模型。
在一个实施例中，根据所述目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶的步骤包括：
获取目标***面的每个顶点对应颜色的六基色灰阶，其中，L1种基色在目标***面每个顶点所对应颜色中的灰阶均为所述预设灰阶范围的最大值，L2种基色在目标***面每个顶点所对应颜色中的灰阶均为所述预设灰阶范围的最小值，L1和L2均为大于等于0的整数，且L1+L2＝4；
对于六基色中的每一种基色，当该基色在每个顶点对应颜色中的灰阶均为所述预设灰阶范围的最大值时，将目标颜色中相应基色的参考灰阶确定为所述预设灰阶范围的最大值；当该基色在每个顶点对应颜色中的灰阶均为所述预设灰阶范围的最小值时，将目标颜色中相应基色的参考灰阶确定为所述预设灰阶范围的最小值。
在一个实施例中，所述预设灰阶范围为0～1；或者，所述预设灰阶范围为0～2 n-1，n为大于1的整数。
在一个实施例中，所述***面具有四个顶点，以使所述***面在CIE xyY色空间的xoy面上的投影形状为四边形；
根据所述目标颜色的色坐标以及每个所述***面各顶点所对应颜色的色坐标，确定所述目标颜色对应的目标***面的步骤包括：
获取目标颜色的色坐标(x 0，y 0)；
对于任意一个***面，获取该***面的各顶点对应颜色的色坐标(x 1，y 1)、(x 2，y 2)、(x 3，y 3)和(x 4，y 4)，并根据以下公式计算a、b、c、d的值：
Figure PCTCN2018115193-appb-000008
当a、b、c、d同号时，判定该***面为所述目标颜色对应的目标***面。
在一个实施例中，根据所述目标颜色的参考亮度与目标亮度的 比例关系，将所述目标颜色的每种基色的参考灰阶分别转换为目标灰阶的步骤包括：
将所述目标颜色的目标亮度除以所述目标颜色的参考亮度，以获取目标亮度与参考亮度的比例系数；
对于目标颜色的每种基色，均获取该基色的参考灰阶与所述比例系数的乘积，并将获得的乘积作为该种基色的目标灰阶。
在一个实施例中，所述多种基色包括红、绿、蓝、黄、青和品红。
相应地，本公开还提供一种驱动显示面板显示待显示图像的驱动方法，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色种类大于3种，所述驱动方法包括：
获取待显示图像中各个图像像素单元的目标颜色的颜色信息；
根据本公开提供的上述多基色转换方法，将各个显示像素单元的目标颜色的色彩信息转换为多种基色的灰阶，所述目标颜色的色彩信息包括所述目标颜色的色坐标和目标亮度；
根据多种基色的灰阶为显示面板的各个图像像素单元提供相应的驱动信号，以使得所述显示面板各个图像像素单元显示所述目标颜色。
相应地，本公开还提供一种用于驱动显示面板的驱动装置，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色种类大于3种，其中，所述驱动装置包括处理器，以及用于存储至少一个程序的存储器；其中，当所述至少一个程序被所述至少一个处理器执行时，使得所述至少一个处理器执行根据本公开的上述驱动方法。。
相应地，本公开还提供一种显示设备，包括显示面板和上述用于驱动显示面板的驱动装置，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色的种类大于3种。
在一个实施例中，所述多个子显示像素单元包括红色子显示像素单元、绿色子显示像素单元、蓝色子显示像素单元、青色子显示像素单元、黄色子显示像素单元和品红色子显示像素单元。
附图说明
附图是用来提供对本公开的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本公开，但并不构成对本公开的限制。在附图中：
图1是本公开实施例中提供的多基色转换方法的流程图；
图2是本公开实施例中提供的多基色转换方法的另一流程图；
图3a是显示面板的空间色域模型；
图3b是空间色域模型的各***面在xoy面上的投影分布图。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本公开，并不用于限制本公开。
随着显示技术的不断发展，对显示屏幕的分辨率和表现能力要求越来越高，从而导致了屏幕的功耗的提升和数据传输量的提高；而现有的三基色显示面板的显示能力有限，只能显示一定范围内的色彩。为了解决屏幕分辨率提高带来的功耗和数据传输量的提高，以及对屏幕表现能力的要求高的问题，一些厂家提出了六基色显示面板，但在驱动六基色显示面板显示时，无法将目标颜色的色彩信息(即，色坐标和亮度)准确地转换为六基色的灰阶，从而难以使六基色显示面板准确地显示出目标颜色。
目前，对于三基色(红、绿、蓝)显示面板，通过三基色灰阶与色彩信息之间的转换关系(参见下述公式(0-1)和公式(0-2))，将目标颜色的色彩信息(包括色坐标x 0，y 0以及目标亮度Y 0)转换为三基色的灰阶Gray_R 0、Gray_G 0和Gray_B 0：
Figure PCTCN2018115193-appb-000009
x 0＝X 0/(X 0+Y 0+Z 0)
y 0＝Y 0/(X 0+Y 0+Z 0)      (0-2)
z 0＝Z 0/(X 0+Y 0+Z 0)
其中，X 0、Y 0和Z 0分别为CIE XYZ***(即CIE1931 XYZ***)中与目标颜色对应的三刺激值，Y 0也为目标颜色的目标亮度；
Figure PCTCN2018115193-appb-000010
为显示面板将三基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，其中，X R、X G和X B分别为将三基色的灰阶Gray_R 0、Gray_G 0和Gray_B 0转换为刺激值X 0时，三基色的转换系数；Y R、Y G和Y B分别为将三基色的灰阶Gray_R 0、Gray_G 0和Gray_B 0转换为刺激值B 0时，三基色的转换系数；Z R、Z G和Z B分别为将三基色的灰阶Gray_R 0、Gray_G 0和Gray_B 0转换为刺激值Z 0时，三基色的转换系数。应当理解的是，矩阵中的各元素的值均为预定常数。
具体地，在利用上述公式(0-1)和(0-2)进行三基色转换时，先根据公式(0-2)获取X 0和Z 0的值，将X 0、Y 0和Z 0的值代入公式(0-1)，这样，根据公式(0-1)可以得到关于三个待计算的灰阶的三个方程，从而得到三基色的灰阶的唯一值。但是当显示面板的基色种类增加而大于3时，就会得到关于多基色灰阶的三个方程，其中未知数的数量大于3，从而无法准确获取每种基色的灰阶，即无法准确地将目标颜色的色彩信息转换为多基色的灰阶。
为了解决现有技术中无法准确地将目标颜色的色彩信息转换为多基色的灰阶的技术问题，本公开提供一种多基色转换方法，用于将待显示的目标颜色的色彩信息转换为多种基色的目标灰阶，所述基色种类大于3，所述目标颜色的色彩信息包括所述目标颜色的色坐标和目标亮度。如图1所示，所述多基色转换方法包括以下步骤S1～S5：
S1、根据显示面板所能够显示的所有颜色，在CIE xyY色空间 (即CIE1931 xyY色空间)中建立所述显示面板的空间色域模型60，如图3a所示，该空间色域模型60由多个***面和所述CIE xyY色空间的xoy面围成；每个***面具有多个顶点，各***面在xoy上的投影如图3b所示，所述***面在所述xoy面上的投影形状为多边形，不同***面在所述xoy面上的投影的内部区域无重叠。应当理解的是，此处的“不同***面在所述xoy面上的投影的内部区域无重叠”是指，两个***面的一部分边界可以重合，但是边界以内的区域无重叠。可以理解，CIE xyY色空间中，通过亮度和色坐标(x，y)来描述颜色，例如，在CIE xyY色空间中，位置坐标为(a，b，c)的点表示色坐标为(a，b)、亮度为c的颜色。换言之，根据某一颜色的色坐标和亮度，可以在CIE xyY空间中找到相应的点。
S2、根据所述目标颜色的色坐标以及每个所述***面各顶点所对应颜色的色坐标，确定所述目标颜色对应的目标***面。所述目标颜色对应的目标***面是指，所述目标颜色所对应的点沿垂直于xoy面的方向所能够落入的***面。即，所述目标颜色所对应的点在xoy面上的正投影位于目标***面在xoy面上的正投影范围内。
S3、根据目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶。需要说明的是，本公开中的“灰阶”可以是未经过归一化处理的灰阶值(例如，灰阶在0～255之间)，也可以是经过归一化处理的灰阶值(即，灰阶在0～1之间)。
可以理解的是，目标颜色的色坐标与所述目标颜色所对应的点在目标***面上投影点所对应颜色的色坐标相同，而目标***面上每个点对应颜色的一部分基色灰阶与目标***面的顶点所对应颜色的一部分基色灰阶是相同的，因此，可以根据目标***面的各顶点所对应颜色的每种基色的灰阶，获取目标颜色的一部分基色的参考灰阶。例如，当目标***面的每个顶点所对应颜色中，红色灰阶均为0，那么，该目标***面上每个点所对应颜色的红色灰阶均为0，从而将目标颜色中红色的参考灰阶确定为0。
S4、根据获得的目标颜色的一部分基色的参考灰阶以及目标颜色的各基色灰阶与目标颜色的参考亮度、色坐标之间的关系，获取目 标颜色的其余基色的参考灰阶和目标颜色的参考亮度。
S5、根据所述目标颜色的参考亮度与目标亮度的比例关系，将所述目标颜色的每种基色的参考灰阶分别转换为目标灰阶。
利用本公开所提供的方法将目标颜色的色彩信息转换为多种基色的灰阶时，由于先利用空间色域模型60确定出了一部分基色的灰阶，因此，根据多基色灰阶与色彩信息之间的转换关系得到的三个方程中，未知数的数量是少于基色种类数的，从而便于将待显示的目标颜色的色彩信息转换为多种基色的目标灰阶。
本公开的多基色转换方法尤其适用于将目标颜色的色彩信息转换为六种基色的灰阶，六种基色分别为红(R)、绿(G)、蓝(B)、黄(Y)、青(C)和品红(M)。下面以六基色为例，对本公开的多基色转换方法进行详细介绍。
所述多基色装置方法包括以下步骤S1～S5：
S1、根据显示面板所能够显示的所有颜色，在CIE xyY色空间中建立所述显示面板的空间色域模型60。实际应用中，可以采用Matlab软件来绘制所有颜色。其中，该空间色域模型由多个***面和所述CIE xyY色空间的xoy面围成；每个***面具有四个顶点，以使所述***面在所述xoy面上的投影形状为四边形，每个四边形的顶点代表纯色点，因此四边形内部的点可被所围四个顶点匹配得到。每个四边形的顶点表示哪几个基色为最大值时混合得到的颜色位于该点上，例如对于顶点为G-GY-GC-GYC的四边形，顶点G代表G＝255，其他5个原色刺激值为0时混合得到的颜色在色度图上所处位置；GY处有：G＝Y＝255，R＝B＝M＝C＝0；GC处有：G＝C＝255，R＝B＝M＝Y＝0；GYC处有：G＝Y＝C＝255，R＝B＝M＝0。则对应该四边形内的颜色来说共同特征是：G＝255，R＝B＝M＝0。如果目标颜色位于该四边形内，则六刺激值中有4个是已知的了。不同***面在所述xoy面上的投影的内部区域无重叠。具体地，如图2所示，该步骤S1包括以下步骤S11～S13：
S11、设置多组六基色的样本灰阶，每种基色的样本灰阶的取值范围均在预设灰阶范围内。如上文所述，本公开的“灰阶”可以是未 经过归一化处理的灰阶，相应地，所述预设灰阶范围为0～2 n-1，n为大于1的整数。具体地，n可以为8，则所述预设灰阶范围为0～255。本公开的“灰阶”也可以是经过归一化处理的灰阶，相应地，所述预设灰阶范围为0～1。
S12、每设置一组六基色的样本灰阶，均根据公式(1)和公式(2)确定显示面板所显示的样本颜色的色坐标(x‘，y’)和亮度Y’；
Figure PCTCN2018115193-appb-000011
Figure PCTCN2018115193-appb-000012
其中，Gray_R’、Gray_G’、Gray_B’、Gray_YE’、Gray_C’、Gray_M’分别为六基色的样本灰度。X’、Y’、Z’构成了CIE XYZ***中与样本颜色对应的三刺激值。
Figure PCTCN2018115193-appb-000013
为显示面板将六基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，该矩阵中的各元素均为预设常数。具体地，当六基色灰阶分别为Gray_R’、Gray_G’、Gray_B’、Gray_YE’、Gray_C’和Gray_M’，三刺激值分别为X’、Y’和Z’时，X R、X G、X B、X YE、X C、X M分别为六基色转换为刺激值X’时的转换系数；Y R、Y G、Y B、Y YE、Y C、Y M分别为六基色转换为刺激值Y’时的转换系数；Z R、Z G、Z B、Z YE、Z C、Z M分别为六基色转换为刺激值Z’时的转换系数。
S13、根据所有样本颜色的色坐标和亮度在所述CIE xyY色空间中建立所述显示面板的空间色域模型。所述空间色域模型具有24个***面，每个***面具有四个顶点。
S2、根据所述目标颜色的色坐标以及每个所述***面各顶点所对应颜色的色坐标，确定所述目标颜色对应的目标***面。具体地，设目标颜色对应的点在xoy面上的投影为点P，某一***面的各顶点在xoy面上的投影分别为O 1、O 2、O 3和O 4，如果O 1、O 2、O 3和O 4确定的***面为所述目标***面，那么以下四个向量乘积
Figure PCTCN2018115193-appb-000014
Figure PCTCN2018115193-appb-000015
同号。据此，如图2所示，该步骤S2包括：
S21、获取目标颜色的色坐标(x 0，y 0)。
S22、对于任意一个***面，获取该***面的各顶点对应颜色的色坐标(x 1，y 1)、(x 2，y 2)、(x 3，y 3)和(x 4，y 4)，并根据以下公式(3)计算a、b、c、d的值：
Figure PCTCN2018115193-appb-000016
当a、b、c、d同号时，判定该***面为所述目标颜色对应的目标***面。应当理解，a、b、c、d同号是指，a、b、c、d是否同时为正或同时为负。需要说明的是，当a、b、c、d中任意一者为0时，可以将其看作符号为正，或符号为负。例如，当a、b、c、d均大于等于0，或均小于等于0时，认为a、b、c、d同号。
S3、根据目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶。具体地，步骤S3包括：
S31、获取目标***面的每个顶点对应颜色的六基色灰阶。其中，L1种基色在目标***面每个顶点所对应颜色中的灰阶均为所述预设灰阶范围的最大值，L2种基色在目标***面每个顶点所对应颜色中的灰阶均为所述预设灰阶范围的最小值，L1和L2均为大于等于0的整数，且L1+L2＝4。
S32、对于六种基色中的每一种基色，当该基色在每个顶点对应颜色中的灰阶均为所述预设灰阶范围的最大值时，将目标颜色中相应基色的参考灰阶确定为所述预设灰阶范围的最大值；当该基色在每个 顶点对应颜色中的灰阶均为所述预设灰阶范围的最小值时，将目标颜色中相应基色的参考灰阶确定为所述预设灰阶范围的最小值。例如，所述预设灰阶范围为0～255，若每个顶点对应颜色中的红色灰阶均为255，则目标颜色中红色的参考灰阶也为255；若每个顶点对应颜色中的绿色灰阶均为0，则目标颜色中绿色的参考灰阶也为0。对于任意一个***面上的四个顶点而言，灰阶达到255的基色种类数与灰阶为0的基色种类数之和为四种，从而可以根据步骤S32确定目标颜色中四种基色的参考灰阶。
S4、根据获得的目标颜色的四种基色的参考灰阶以及目标颜色的各基色灰阶与目标颜色的参考亮度、色坐标之间的关系，获取目标颜色的其余基色的参考灰阶和目标颜色的参考亮度。具体地，该步骤S4包括：
根据步骤S3中获得的目标颜色的四种基色的参考灰阶、目标颜色的色坐标(x 0，y 0)和以下公式(4)，确定目标颜色的其余两种基色的参考灰阶和目标颜色的参考亮度Ymax：
Figure PCTCN2018115193-appb-000017
其中，Gray_R、Gray_G、Gray_B、Gray_YE、Gray_C、Gray_M中的四个为步骤S3中所获得的参考灰阶，其余两个为待确定的两种基色的参考灰阶。Xmax、Ymax、Zmax构成了CIE XYZ***中与色坐标为(x 0，y 0)、亮度为Ymax的颜色对应的三刺激值；并且，
Figure PCTCN2018115193-appb-000018
为显示面板将六基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，该矩阵中的各元素均为预设常数。具体地，当六基色灰阶分别为Gray_R、Gray_G、Gray_B、Gray_YE、Gray_C、Gray_M，三刺激值分别为Xmax、Ymax、Zmax时，X R、X G、X B、X YE、X C、X M分别为 六基色转换为刺激值Xmax时的转换系数；Y R、Y G、Y B、Y YE、Y C、Y M分别为六基色转换为刺激值Ymax时的转换系数；Z R、Z G、Z B、Z YE、Z C、Z M分别为六基色转换为刺激值Zmax时的转换系数。
可见，由于Xmax、Zmax均可以用包含Ymax的代数式表示，且Gray_R、Gray_G、Gray_B、Gray_YE、Gray_C、Gray_M中有四个为已知，因此，通过上述公式(4)可以得到包含三个未知数的三个方程式，从而得到每种基色参考灰阶的唯一解。
步骤S4之后，进行以下步骤S5：根据所述目标颜色的参考亮度与目标亮度的比例关系，将所述目标颜色的每种基色的参考灰阶分别转换为目标灰阶。具体地，如图2所示，该步骤S5包括：
S51、将所述目标颜色的目标亮度除以所述目标颜色的参考亮度，以获取目标亮度与参考亮度的比例系数k。即，k＝Y 0/Ymax。
S52、对于目标颜色的每种基色，均获取该基色的参考灰阶与所述比例系数的乘积，并将获得的乘积作为该种基色的目标灰阶。
相应地，本公开还提供一种驱动显示面板显示待显示图像的驱动方法，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色种类大于3种，所述驱动方法包括：
获取待显示图像中各个图像像素单元的目标颜色的颜色信息；
根据本公开提供的上述多基色转换方法，将待显示图像的各个显示像素单元的目标颜色的色彩信息转换为多种基色的灰阶，所述目标颜色的色彩信息包括所述目标颜色的色坐标和目标亮度。
然后，根据多种基色的灰阶为显示面板的各个图像像素单元提供相应的驱动信号，以使得所述显示面板各个图像像素单元显示所述目标颜色。
需要说明的是，所述驱动方法还可以直接根据各基色的灰阶生成驱动信号，也可以将各基色的灰阶进行渲染处理，之后再根据渲染后的灰阶生成驱动信号。
相应地，本公开还提供一种计算机可读存储介质，所述计算机 可读存储介质中存储有指令，当所述计算机可读存储介质在计算机上运行时，使得所述计算机执行上述多基色显示面板的驱动方法。
相应地，本公开还提供一种用于驱动显示面板的驱动装置，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色种类大于3种，其中，所述驱动装置包括处理器，以及用于存储至少一个程序的存储器；其中，当所述至少一个程序被所述至少一个处理器执行时，使得所述至少一个处理器执行本公开上述的驱动方法
相应地，本公开还提供一种显示设备，包括显示面板和上述用于驱动显示面板的驱动装置，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色的种类大于3种。
所述多个子显示像素单元包括红色子显示像素单元、绿色子显示像素单元、蓝色子显示像素单元、青色子显示像素单元、黄色子显示像素单元和品红色子显示像素单元。
由于所述计算机可读存储介质在计算机上运行时，能够使得计算机执行上述驱动方法，从而准确获得六种基色的目标灰阶，并提供相应的驱动信号，因此，当所述计算机可读存储介质在在所述显示装置上运行时，能够使得显示装置实际显示的颜色与目标颜色更接近，从而改善显示效果。
本公开提供的用于驱动显示面板的驱动装置包括诸如CPU的至少一个处理器，以及诸如ROM的用于存储至少一个程序的存储器。其中，当所述至少一个程序被所述至少一个处理器执行时，使得所述至少一个处理器执行前述的用于驱动显示面板的驱动方法。
本公开的实施例中所涉及到的单元或模块可以通过软件的方式实现，也可以通过硬件的方式来实现。各个单元或模块可以是设置在所述处理器中的软件程序，例如，各个单元或模块可以是设置在计算机或移动智能设备中的软件程序；各个单元或模块也可以是单独配置的硬件装置。这些单元或模块的名称并不构成对该单元或模块本身的限定。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

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  1. 一种多基色转换方法，用于将待显示的目标颜色的色彩信息转换为多种基色的目标灰阶，所述基色种类大于3，所述目标颜色的色彩信息包括所述目标颜色的色坐标(x 0，y 0)和目标亮度(Y 0)，其中，所述多基色转换方法包括：
    根据显示面板所能够显示的所有颜色，在CIE xyY色空间中建立所述显示面板的空间色域模型，该空间色域模型由多个***面和所述CIE xyY色空间的xoy面围成；每个***面具有多个顶点，以使所述***面在所述xoy面上的投影形状为多边形，所述多边形的每个顶点表示至少一种基色为最大值时混合得到的颜色位于该点上，不同***面在所述xoy面上的投影的内部区域无重叠；
    根据所述目标颜色的色坐标以及每个***面各顶点所对应颜色的色坐标，确定所述目标颜色对应的目标***面；
    根据所述目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶；
    根据获得的所述目标颜色的一部分基色的参考灰阶以及目标颜色的各基色灰阶与目标颜色的参考亮度、色坐标之间的关系，获取所述目标颜色的其余基色的参考灰阶和所述目标颜色的参考亮度；以及
    根据所述目标颜色的参考亮度与目标亮度的比例关系，将所述目标颜色的每种基色的参考灰阶分别转换为目标灰阶。
  2. 根据权利要求1所述的多基色转换方法，其中，所述多种基色为六种基色；以及
    根据所述目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶的步骤包括获取所述目标颜色的四种基色的参考灰阶。
  3. 根据权利要求2所述的多基色转换方法，其中，获取所述目标颜色的其余基色的参考灰阶和目标颜色的参考亮度的步骤包括：
    根据获得的所述目标颜色的四种基色的参考灰阶、所述目标颜色的色坐标(x 0，y 0)和以下公式，确定所述目标颜色的其余两种基色的参考灰阶和所述目标颜色的参考亮度Ymax：
    Figure PCTCN2018115193-appb-100001
    其中，Gray_R、Gray_G、Gray_B、Gray_YE、Gray_C、Gray_M中的四个为：根据所述目标***面的每个顶点所对应颜色的各基色的灰阶所获得的四种基色的参考灰阶；其余两个为待确定的其余两种基色的参考灰阶；
    Xmax、Ymax、Zmax构成了CIE XYZ***中与色坐标为(x 0，y 0)、亮度为Ymax的颜色对应的三刺激值；并且，
    Figure PCTCN2018115193-appb-100002
    Figure PCTCN2018115193-appb-100003
    Figure PCTCN2018115193-appb-100004
    为显示面板将六基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，该矩阵中的各元素均为预设常数。
  4. 根据权利要求2或3所述的多基色转换方法，其中，根据显示面板所能够显示的所有颜色，在CIE xyY色空间中建立所述显示面板的空间色域模型的步骤包括：
    设置多组六基色的样本灰阶，每种基色的样本灰阶的取值范围均在预设灰阶范围内；
    每设置一组六基色的样本灰阶，均根据公式(1)和公式(2)确定显示面板所显示的样本颜色的色坐标(x‘，y’)和亮度Y’：
    Figure PCTCN2018115193-appb-100005
    Figure PCTCN2018115193-appb-100006
    其中，Gray_R’、Gray_G’、Gray_B’、Gray_YE’、Gray_C’、Gray_M’分别为六基色的样本灰度；X’、Y’、Z’构成了CIE XYZ***中与样本颜色对应的三刺激值；
    Figure PCTCN2018115193-appb-100007
    为显示面板将六基色灰阶与CIE XYZ***中的三刺激值之间的转换矩阵，该矩阵中的各元素均为预设常数；
    根据所有样本颜色的色坐标和亮度在所述CIE xyY色空间中建立所述显示面板的空间色域模型。
  5. 根据权利要求4所述的多基色转换方法，其中，根据所述目标***面的每个顶点所对应颜色的各基色的灰阶，获取所述目标颜色的一部分基色的参考灰阶的步骤包括：
    获取目标***面的每个顶点对应颜色的六基色灰阶，其中，L1种基色在目标***面每个顶点所对应颜色中的灰阶均为所述预设灰阶范围的最大值，L2种基色在目标***面每个顶点所对应颜色中的灰阶均为所述预设灰阶范围的最小值，L1和L2均为大于等于0的整数，且L1+L2＝4；
    对于六基色中的每一种基色，当该基色在每个顶点对应颜色中的灰阶均为所述预设灰阶范围的最大值时，将目标颜色中相应基色的参考灰阶确定为所述预设灰阶范围的最大值；当该基色在每个顶点对应颜色中的灰阶均为所述预设灰阶范围的最小值时，将目标颜色中相 应基色的参考灰阶确定为所述预设灰阶范围的最小值。
  6. 根据权利要求4所述的多基色转换方法，其中，所述预设灰阶范围为0～1；或者，
    所述预设灰阶范围为0～2 n-1，n为大于1的整数。
  7. 根据权利要求1至6中任意一项所述的多基色转换方法，其中，所述***面具有四个顶点，以使所述***面在CIE xyY色空间的xoy面上的投影形状为四边形；
    根据所述目标颜色的色坐标以及每个所述***面各顶点所对应颜色的色坐标，确定所述目标颜色对应的目标***面的步骤包括：
    获取目标颜色的色坐标(x 0，y 0)；
    对于任意一个***面，获取该***面的各顶点对应颜色的色坐标(x 1，y 1)、(x 2，y 2)、(x 3，y 3)和(x 4，y 4)，并根据以下公式计算a、b、c、d的值：
    Figure PCTCN2018115193-appb-100008
    当a、b、c、d同号时，判定该***面为所述目标颜色对应的目标***面。
  8. 根据权利要求1至7中任意一项所述的多基色转换方法，其中，根据所述目标颜色的参考亮度与目标亮度的比例关系，将所述目标颜色的每种基色的参考灰阶分别转换为目标灰阶的步骤包括：
    将所述目标颜色的目标亮度除以所述目标颜色的参考亮度，以获取目标亮度与参考亮度的比例系数；
    对于目标颜色的每种基色，均获取该基色的参考灰阶与所述比例系数的乘积，并将获得的乘积作为该种基色的目标灰阶。
  9. 根据权利要求1至8中任意一项所述的多基色转换方法，其 中，所述多种基色包括红、绿、蓝、黄、青和品红。
  10. 一种驱动显示面板显示待显示图像的驱动方法，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色种类大于3种，所述驱动方法包括：
    获取待显示图像中各个图像像素单元的目标颜色的颜色信息；
    根据权利要求1至9中任一所述的多基色转换方法，将待显示图像的各个显示像素单元的目标颜色的色彩信息转换为多种基色的灰阶，所述目标颜色的色彩信息包括所述目标颜色的色坐标和目标亮度；
    根据多种基色的灰阶为显示面板的各个图像像素单元提供相应的驱动信号，以使得所述显示面板各个图像像素单元显示所述目标颜色。
  11. 一种用于驱动显示面板的驱动装置，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色种类大于3种，其中，所述驱动装置包括处理器，以及用于存储至少一个程序的存储器；其中，当所述至少一个程序被所述至少一个处理器执行时，使得所述至少一个处理器执行根据权利要求10所述的驱动方法。
  12. 一种显示设备，包括显示面板和权利要求11所述的用于驱动显示面板的驱动装置，所述显示面板包括多个显示像素单元，每个显示像素单元包括具有多种基色的子显示像素单元，多种基色的种类大于3种。
  13. 根据权利要求12所述的显示设备，其中，所述多个子显示像素单元包括红色子显示像素单元、绿色子显示像素单元、蓝色子显示像素单元、青色子显示像素单元、黄色子显示像素单元和品红色子显示像素单元。
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