Patent Publication Number: US-9905145-B2

Title: Pixel structure, its driving method and display device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is the U.S. national phase of PCT Application No. PCT/CN2015/072141 filed on Feb. 3, 2015, which claims a priority of the Chinese patent application No. 201410613079.5 filed on Nov. 4, 2014, which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to the field of display technology, in particular to a pixel structure, its driving method and a display device. 
     BACKGROUND 
     For an existing display panel, a pixel unit, as a common pixel design, includes three subpixels (i.e., a red subpixel, a green subpixel and a blue subpixel) or four subpixels (i.e., a red subpixel, a green subpixel, a blue subpixel and a white subpixel) for display, and a physical resolution is just a visual resolution. 
     Along with an increase in the user&#39;s experience on the display panel (i.e., an increase in the requirements on the visual resolution), it is required to increase a pixel per inch (PPI) of the display panel. However, an increase in the PPI will result in a complex process for manufacturing the display panel. 
     Hence, there is an urgent need in the art to increase the visual resolution without increasing the difficulty in manufacturing the display panel. 
     SUMMARY 
     An object of the present disclosure is to provide a pixel structure, its driving method and a display device, so as to increase a visual resolution without increasing the difficulty in manufacturing the display device. 
     In one aspect, the present disclosure provides in one embodiment a pixel structure, including a plurality of repeating units consisting of subpixels. Each repeating unit includes four subpixels in different colors, which are divided into two groups. Each group of subpixels includes a subpixel with its major-axis direction as a first direction and a subpixel with its major-axis as a second direction perpendicular to the first direction. 
     Alternatively, the first direction is a row direction, and the second direction is a column direction. 
     Alternatively, the subpixel is of a quadrilateral shape. 
     Alternatively, the two subpixels in each group of subpixels are each of an L shape and a mirror image of L and arranged in such a manner as to be rotated by 0°, 45°, 90°, 135° or 180° in a clockwise or counterclockwise direction. 
     Alternatively, in each repeating unit, the two subpixels with their major-axis direction as the first direction are arranged in adjacent rows, and the two subpixels with their major-axis direction as the first direction are staggered relative to each other in the column direction by a predetermined distance. 
     Alternatively, in each repeating unit, the two subpixels with their major-axis direction as the second direction are adjacent to the two subpixels with their major-axis direction as the first direction, and the two subpixels with their major-axis direction as the second direction are not adjacent to each other. 
     Alternatively, in the two groups of subpixels in each repeating unit, the two subpixels with their major-axis direction as the second direction are arranged in adjacent columns, and the two subpixels with their major-axis direction as the second direction are staggered relative to each other in the row direction by a predetermined distance. 
     Alternatively, in each repeating unit, the two subpixels with their major-axis direction as the first direction are adjacent to the two subpixels with their major-axis direction as the second direction, and the two subpixels with their major-axis direction as the first direction are not adjacent to each other. 
     Alternatively, a length of each subpixel in the major-axis direction and a length of the subpixel in a minor-axis direction meet 2S&lt;L&lt;3S, wherein S represents the length of the subpixel in the minor-axis direction, and L represents the length of the subpixel in the major-axis direction. 
     Alternatively, the plurality of repeating units are arranged repeatedly in a third direction which is a direction rotated in a counterclockwise direction by 45° relative to the row direction, or a direction rotated in the counterclockwise direction by 45° relative to the column direction. 
     Alternatively, the subpixels with their major-axis direction as the first direction are arranged sequentially in the third direction, and the subpixels with their major-axis direction as the second direction are also arranged sequentially in the third direction. 
     Alternatively, the subpixels with their major-axis direction as the first direction include subpixels in a first color and subpixels in a second color, the subpixels with their major-axis direction as the second direction include subpixels in a third color and subpixels in a fourth color, the subpixels in the first color and the second color are arranged alternately in the third direction, and the subpixels in the third color and the fourth color are arranged alternately in the third direction. 
     Alternatively, the subpixels in four different colors include three subpixels in primitive colors and one subpixel in a complementary color, the subpixels in the primitive colors include a red subpixel, a green subpixel and a blue subpixel, and the subpixel in the complementary color includes a white subpixel, a magenta subpixel, a cyan subpixel, a yellow subpixel or a garnet subpixel. 
     In another aspect, the present disclosure provides in one embodiment a display device including the above-mentioned pixel structure and a device for driving the pixel structure. 
     In yet another aspect, the present disclosure provides in one embodiment a method for driving the above-mentioned pixel structure, including steps of: 
     causing a desired color component of a primitive color to be displayed at each subpixel position, including causing a plurality of subpixels in an identical primitive color in proximity to the subpixel position to display together, and causing the desired color component to be displayed at the subpixel position under an average effect of the plurality of subpixels in the identical primitive color; and 
     performing display compensation at the subpixel position, including performing the display compensation at the subpixel position under an average effect of a plurality of subpixels in a complementary color in proximity to the subpixel position. 
     Alternatively, when a color component of a primitive color identical to a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position, the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes the subpixel at the subpixel position and a plurality of subpixels in the identical primitive color surrounding the subpixel position. When a color component of a primitive color different from a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position, the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes a plurality of subpixels in a primitive color identical to the to-be-displayed color component surrounding the subpixel position. 
     Alternatively, when a color component of a primitive color identical to a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position, the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes: 
     eight subpixels in the primitive color identical to the color of the subpixel at the subpixel position in closest proximity to the subpixel position, which are arranged at both sides of a row in which the subpixel position is located, and in the upper three rows and the lower three rows adjacent to the row in which the subpixel position is located, and which form a parallelogram; or 
     eight subpixels in the primitive color identical to the color of the subpixel at the subpixel position in closest proximity to the subpixel position, which are arranged at both sides of a column in which the subpixel position is located, and in the left five columns and the right five columns adjacent to the column in which the subpixel position is located, and which form a parallelogram; or 
     three subpixels in the primitive color identical to the color of the subpixel at the subpixel position surrounding the subpixel position, which form together with the subpixel at the subpixel position a diamond; or 
     two subpixels in the primitive color identical to the color of the subpixel at the subpixel position surrounding the subpixel position, which form together with the subpixel at the subpixel position an equilateral triangle; or 
     two subpixels in the primitive color identical to the color of the subpixel at the subpixel position surrounding the subpixel position, which form together with the subpixel at the subpixel position an isosceles triangle. 
     Alternatively, when a color component of a primitive color different from a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position, the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes: 
     eight subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     four subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     three subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form an equilateral triangle that at least partially overlaps the subpixel position; or 
     three subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form an isosceles triangle that at least partially overlaps the subpixel position. 
     Alternatively, when a color component of the primitive color identical to a color of a subpixel at a subpixel position is to desired to be displayed at the subpixel position, the step of causing the plurality of subpixels in the identical primitive color in proximity to the subpixel position to display together includes obtaining color subcomponents of the subpixel at the subpixel position and the plurality of subpixels in the primitive color identical to the color of the subpixel surrounding the subpixel position, through multiplying display scale coefficients corresponding to the subpixel at the subpixel position and the plurality of subpixels in the primitive color identical to the color of the subpixel surrounding the subpixel position by the color component of the primitive color to be displayed at the subpixel position. When a color component of the primitive color different from a color of a subpixel at a subpixel position is to desired to be displayed at the subpixel position, the step of causing the plurality of subpixels in the identical primitive color in proximity to the subpixel position to display together includes obtaining color subcomponents of the plurality of subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, through multiplying display scale coefficients corresponding to the plurality of subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position by the color component of the primitive color to be displayed at the subpixel position. The display scale coefficient of each subpixel in the primitive color in proximity to the subpixel position is associated with a distance between the subpixel in the primitive color and the subpixel position. 
     Alternatively, when a subpixel at a subpixel position is a subpixel in a complementary color, the plurality of subpixels in the complementary color in proximity to the subpixel position includes the subpixel at the subpixel position and a plurality of subpixels in the complementary subpixels surrounding the subpixel position. When a subpixel at a subpixel position is not a subpixel in a complementary color, the plurality of subpixels in the complementary color in proximity to the subpixel position includes a plurality of subpixels in the complementary color surrounding the subpixel position. 
     Alternatively, when a subpixel at a subpixel position is a subpixel in a complementary color, the plurality of subpixels in the complementary color in proximity to the subpixel position includes: 
     eight subpixels in the complementary color in closest proximity to the subpixel position, which are arranged at both sides of a row in which the subpixel position is located, and in the upper three rows and the lower three rows adjacent to the row in which the subpixel position is located, and which form a parallelogram; or 
     eight subpixels in the complementary color in closest proximity to the subpixel position, which are arranged at both sides of a column in which the subpixel position is located, and in the left five columns and the right five columns adjacent to the column in which the subpixel position is located, and which form a parallelogram; or 
     three subpixels in the complementary color surrounding the subpixel position, which form together with the subpixel at the subpixel position a diamond; or 
     two subpixels in the complementary color surrounding the subpixel position, which form together with the subpixel at the subpixel position an equilateral triangle; or 
     two subpixels in the complementary color surrounding the subpixel position, which form together with the subpixel at the subpixel position an isosceles triangle. 
     Alternatively, when a subpixel at a subpixel position is not a subpixel in a complementary color, the plurality of subpixels in the complementary color surrounding the subpixel position includes: 
     eight subpixels in the complementary color surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     four subpixels in the complementary color surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     three subpixels in the complementary color surrounding the subpixel position, which form an equilateral triangle that at least partially overlaps the subpixel position; or 
     three subpixels in the complementary color surrounding the subpixel position, which form an isosceles triangle that at least partially overlaps the subpixel position. 
     Alternatively, when a subpixel at a subpixel position is a subpixel in a complementary color, the step of performing the display compensation at the subpixel position under the average effect of the plurality of subpixels in the complementary color in proximity to the subpixel position includes obtaining complementary subcomponents of the subpixel at the subpixel position and the plurality of subpixels in the complementary color surrounding the subpixel position, through multiplying display scale coefficients corresponding to the subpixel at the subpixel position and the plurality of subpixels in the complementary color surrounding the subpixel position by the complementary component of the complementary color to be displayed at the subpixel position. When a subpixel at a subpixel position is not a subpixel in the complementary color, the step of performing the display compensation at the subpixel position under the average effect of the plurality of subpixels in the complementary color in proximity to the subpixel position includes obtaining complementary subcomponents of the plurality of subpixels in the complementary color surrounding the subpixel position, through multiplying display scale coefficients corresponding to the plurality of subpixels in the complementary color surrounding the subpixel position by the complementary component of the complementary color to be displayed at the subpixel position. The display scale coefficient of each subpixel in the complementary color in proximity to the subpixel position is associated with a distance between the subpixel in the complementary color and the subpixel position. 
     According to the embodiments of the present disclosure, the four subpixels of each repeating unit in the pixel structure are arranged irregularly, and all the color components may be displayed at each subpixel position. As a result, it is able to remarkably increase the visual resolution and perform the display compensation at each subpixel position without increasing the difficulty in the manufacture process, thereby to improve a display effect. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view showing a major axis and a minor axis of a subpixel according to one embodiment of the present disclosure: 
         FIGS. 2A and 2B  are schematic views showing arrangement modes of the subpixels in a repeating unit according to one embodiment of the present disclosure; 
         FIG. 3  is a schematic view showing an arrangement mode of the subpixels on a display panel according to one embodiment of the present disclosure; 
         FIG. 4  is a schematic view showing position identifiers for the subpixels on the display panel in  FIG. 3 ; 
         FIG. 5  is a schematic view showing a sampling region for green subpixels in the repeating unit according to the first embodiment of the present disclosure; 
         FIG. 6  is a schematic view showing a sampling region for blue subpixels in the repeating unit according to the first embodiment of the present disclosure: 
         FIG. 7  is a schematic view showing a sampling region for white subpixels in the repeating unit according to the first embodiment of the present disclosure; 
         FIG. 8  is a schematic view showing a sampling region for red subpixels in the repeating unit according to the first embodiment of the present disclosure; 
         FIG. 9  is a schematic view showing a sampling region for green subpixels in the repeating unit according to the second embodiment of the present disclosure: 
         FIG. 10  is a schematic view showing a sampling region for green subpixels in the repeating unit according to the third embodiment of the present disclosure; 
         FIG. 11  is a schematic view showing a sampling region for green subpixels in the repeating unit according to the fourth embodiment of the present disclosure; 
         FIG. 12  is a schematic view showing an arrangement mode of four subpixels in the repeating unit according to one embodiment of the present disclosure; 
         FIG. 13  is a schematic view showing a condition where sampling regions for the four subpixels in the repeating unit in  FIG. 12  overlap each other; 
         FIG. 14  is another schematic view showing an arrangement mode of the four subpixels in the repeating unit according to one embodiment of the present disclosure; 
         FIG. 15  is a schematic view showing a condition where sampling regions for the four subpixels in the repeating unit in  FIG. 14  overlap each other; 
         FIG. 16  is yet another schematic view showing an arrangement mode of the four subpixels in the repeating unit according to one embodiment of the present disclosure; and 
         FIG. 17  is a schematic view showing a condition where the four subpixels in the repeating unit in  FIG. 16  overlap each other. 
     
    
    
     DETAILED DESCRIPTION 
     In order to make the objects, the technical solutions and the advantages of the present disclosure more apparent, the present disclosure will be described hereinafter in conjunction with the drawings and embodiments. 
     Referring to  FIGS. 1-3 , the present disclosure provides in one embodiment a pixel structure, which includes a plurality of repeating units consisting of subpixels. Each repeating unit includes four subpixels in different colors, which are divided into two groups. Each group of subpixels includes a subpixel with its major-axis direction as a first direction and a subpixel with its major-axis as a second direction perpendicular to the first direction. 
     Four subpixels in different colors in each repeating unit may include three subpixels in primitive colors and one subpixel in a complementary color. The subpixels in the primitive colors may include red (R), green (G) and blue (B) subpixels, and the subpixel in the complementary color may include a white (W), magenta, yellow, cyan or garnet subpixel. When the subpixel in the complementary color is a white subpixel, it is able to compensate for the brightness of the entire display panel due to high transmittance of the white subpixel. When the subpixel in the complementary color is a magenta, yellow, cyan or garnet subpixel, it is able to compensate for a color range of the entire display panel. 
     The following embodiments are given by taking a repeating unit including R, G, B and W subpixels as an example. 
     Alternatively, the subpixel in the embodiments of the present disclosure is of a quadrilateral shape, and particularly a rectangular shape. 
     Referring to  FIG. 1 , which is a schematic view showing a major axis and a minor axis of the subpixel according to one embodiment of the present disclosure, the major axis L of the subpixel is perpendicular to the minor axis S, and a length of subpixel in the major-axis direction is larger than a length thereof in the minor-axis direction. 
     In a conventional pixel structure, the major axes of the subpixels in each pixel unit usually extend in an identical direction. However, in the pixel structure in the embodiments of the present disclosure, the four subpixels in each repeating unit are arranged irregularly and divided into two groups. Each group of subpixels includes a subpixel with its major-axis direction as the first direction and a subpixel with its major-axis direction as the second direction. Through this arrangement mode, it is able to distribute the subpixels in different colors evenly, display the color more evenly and facilitate the design of a sampling region, which will be described hereinafter, for virtual display, thereby to output an image at high quality using a low physical PPI design. 
     Alternatively, in the embodiments of the present disclosure, the two subpixels in each group of subpixels are each of an L shape and a mirror image of  , and arranged in such a manner as to be rotated by 0°, 45°, 90°, 135° or 180° in a clockwise or counterclockwise direction. For example, one pixel is of a pattern of  , and its mirror image is  . After the L shape is rotated by 0, 45°, 90°, 135° or 180° in the counterclockwise direction, such patterns as  ,  ,  ,  , and   Of course, in the other embodiments, the two subpixels in each group of subpixels are each of a T shape and arranged in such a manner as to be rotated by 0°, 45°, 90°, 135° or 180° in the clockwise or counterclockwise direction. 
     The arrangement modes of the subpixels in the repeating unit will be described hereinafter. 
     Alternatively, the first direction is a row direction, and the second direction is a column direction. In two groups of subpixels in each repeating unit, the two subpixels with their major-axis direction as the second direction are arranged in adjacent columns, and the two subpixels with their major-axis direction as the second direction are staggered relative to each other in the row direction by a predetermined distance. Referring to  FIG. 2A , in each repeating unit, the two subpixels with their major-axis direction as the first direction are adjacent to the two subpixels with their major-axis direction as the second direction, and the two subpixels with their major-axis direction as the first direction are not adjacent to each other. Through this arrangement mode, it is able to ensure that the four subpixels in each repeating unit are arranged as close to each other as possible. 
     Alternatively, the first direction is a row direction, and the second direction is a column direction. In each repeating unit, the two subpixels with their major-axis direction as the first direction are arranged in adjacent rows, and the two subpixels with their major-axis direction as the first direction are staggered relative to each other in the column direction by a predetermined distance. Referring to  FIG. 2B , in each repeating unit, the two subpixels with their major-axis direction as the second direction are adjacent to the two subpixels with their major-axis direction as the second direction, and the two subpixels with their major-axis direction as the second direction are not adjacent to each other. Through this arrangement mode, it is able to ensure that the four subpixels in each repeating unit are arranged as close to each other as possible. 
     Of course, apart from the arrangement modes in  FIGS. 2A and 2B , the four subpixels in each repeating unit may be arranged in any other modes, which are not particularly defined herein. 
     Alternatively, the plurality of repeating units are arranged repeatedly in a third direction which is a direction rotated in a counterclockwise direction by 45° relative to the row direction, or a direction rotated in the counterclockwise direction by 45° relative to the column direction. Referring to  FIG. 3 , which shows a pixel structure where the third direction is a direction rotated in a counterclockwise direction by 45° relative to the row direction, the subpixels with their major-axis direction as the first direction are arranged sequentially in the third direction, the subpixels with their major-axis direction as the second direction are also arranged sequentially in the third direction, and the subpixels with their major-axis direction as the first direction and the subpixels with their major-axis direction as the second direction are arranged alternately in a direction perpendicular to the third direction. 
     Alternatively, the subpixels with their major-axis direction as the first direction include subpixels in a first color and subpixels in a second color, the subpixels with their major-axis direction as the second direction include subpixels in a third color and subpixels in a fourth color, the subpixels in the first color and the second color are arranged alternately in the third direction, and the subpixels in the third color and the fourth color are arranged alternately in the third direction. Through this arrangement mode, it is able to distribute the subpixels evenly, thereby to improve a display effect. 
     Referring to  FIG. 4 , which shows position identifiers for the subpixels in the pixel structure in  FIG. 3 , L 1  represents a first row, L 2  represents a second row, . . . and L 14  represents a 14 th  row, while R 1  represents a first column, R 2  represents a second column, . . . and R 21  represents a 21 st  column. 
     As shown in  FIG. 4 , the subpixels with their major-axis direction as the first direction (the row direction) are arranged by crossing two columns, and the subpixels with their major-axis direction as the second direction (the column direction) are arranged by crossing two rows. Alternatively, a length of each subpixel in the major-axis direction and a length of the subpixel in a minor-axis direction meet 2S&lt;L&lt;3S, wherein S represents the length of the subpixel in the minor-axis direction, and L represents the length of the subpixel in the major-axis direction. 
     The present disclosure further provides in one embodiment a display device including the above-mentioned pixel structure and a device for driving the pixel structure. 
     The present disclosure further provides in one embodiment a method for driving the above-mentioned pixel structure, including steps of: 
     Step S 51 : causing a desired color component of a primitive color to be displayed at each subpixel position, i.e., causing a plurality of subpixels in an identical primitive color in proximity to the subpixel position to display together, and causing the desired color component to be displayed at the subpixel position under an average effect of the plurality of subpixels in the identical primitive color; and 
     Step S 52 : performing display compensation at the subpixel position. i.e., performing the display compensation at the subpixel position under an average effect of a plurality of subpixels in a complementary color in proximity to the subpixel position. 
     The above two steps are required to be performed during a display procedure, and they are used to display the components of three primitive colors and perform the display compensation, respectively, so they may be performed in any order. 
     In the embodiments of the present disclosure, a desired content is displayed at a position where each subpixel is located (rather than by each subpixel), i.e., the desired color components of the three primitive colors are displayed simultaneously. Each color component at each subpixel position is displayed by the plurality of subpixels in the identical primitive color in proximity to the subpixel position, and the desired color component is displayed at the subpixel position under the average effect of the subpixels in the primitive colors. Meanwhile, the subpixel in the complementary color may further be used in the embodiments to perform the display compensation on the subpixel position, thereby to improve the display effect. 
     Of course, it should be appreciated that, because the content at each subpixel position is displayed (and compensated) by the plurality of subpixels, correspondingly, each subpixel is used for the display not only at one position and but also at a plurality of subpixel positions. In other words, for any subpixel, the content to be displayed also depends on the content to be displayed at the corresponding subpixel positions. 
     The driving method in the embodiments of the present disclosure has the following advantageous. At first, all the color components may be displayed at each subpixel position (e.g., the blue component may also be displayed at the R subpixel), i.e., the complete content may be displayed at each subpixel position. Each subpixel position is equivalent to one pixel, so the visual resolution is remarkably increased. Next, the display compensation may be performed at each subpixel position, so it is able to improve the display effect. In addition, the display (and also the compensation) of the content at each subpixel position is a result of the average effect of the plurality of subpixels in proximity to the subpixel position, so it is able to display the color evenly and softly, thereby to improve the display effect. Finally, the display is performed in the method of the present disclosure on the basis of each subpixel position, and the content to be displayed by the subpixels in proximity to each subpixel position is calculated correspondingly, so it is able to directly calculate the content to be displayed by each subpixel, thereby to reduce the operation burden and facilitate the implementation thereof. 
     Alternatively, when a color component of a primitive color identical to a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position (e.g., when a red component is to be displayed at a R subpixel position), the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes the subpixel (the R subpixel) at the subpixel position and a plurality of subpixels (R subpixels) in the identical primitive color surrounding the subpixel position. 
     When a color component of a primitive color different from a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position (e.g., when a green component is to be displayed at a R subpixel position), the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes a plurality of subpixels (G subpixels) in a primitive color identical to the to-be-displayed color component surrounding the subpixel position. In order words, at this time, the subpixels in the primitive color in proximity to the subpixel position do not include the subpixel at the subpixel position (because of different colors). 
     The subpixels in the primitive color in proximity to the subpixel position may be selected in accordance with the practical need. 
     The method for determining the color subcomponent of the plurality of subpixels in the identical primitive color in proximity to the subpixel position will be described hereinafter. 
     Alternatively, when a color component of the primitive color identical to a color of a subpixel at a subpixel position is to desired to be displayed at the subpixel position, the step of causing the plurality of subpixels in the identical primitive color in proximity to the subpixel position to display together includes obtaining color subcomponents of the subpixel at the subpixel position and the plurality of subpixels in the primitive color identical to the color of the subpixel surrounding the subpixel position, through multiplying display scale coefficients corresponding to the subpixel at the subpixel position and the plurality of subpixels in the primitive color identical to the color of the subpixel surrounding the subpixel position by the color component of the primitive color to be displayed at the subpixel position. 
     When a color component of the primitive color different from a color of a subpixel at a subpixel position is to desired to be displayed at the subpixel position, the step of causing the plurality of subpixels in the identical primitive color in proximity to the subpixel position to display together includes obtaining color subcomponents of the plurality of subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, through multiplying display scale coefficients corresponding to the plurality of subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position by the color component of the primitive color to be displayed at the subpixel position. 
     The display scale coefficient of each subpixel in the primitive color in proximity to the subpixel position is associated with a distance between the subpixel in the primitive color and the subpixel position. 
     For example, when a color component in a color identical to a subpixel (e.g., a R subpixel) at a subpixel position is to be displayed at the subpixel position, a display scale coefficient (e.g., 0.76) of the R subpixel at the subpixel position is multiplied by a desired color component Y to be displayed at the subpixel position, so as to obtain the color subcomponent (0.76Y) of the R subpixel at the subpixel position; and a display scale coefficient of each of the eight R subpixels surrounding the subpixel position (e.g., a display scale coefficient of each R subpixel surrounding the subpixel position is 0.03) is multiplied by the desired color component Y to be displayed at the subpixel position, so as to obtain the color subcomponent (0.03Y) of each of the R subpixels surrounding the subpixel position. 
     Alternatively, when a subpixel at a subpixel position is a subpixel in a complementary color, the plurality of subpixels in the complementary color in proximity to the subpixel position includes the subpixel at the subpixel position and a plurality of subpixels in the complementary color surrounding the subpixel position. When a subpixel at a subpixel position is not a subpixel in a complementary color, the plurality of subpixels in the complementary color in proximity to the subpixel position includes a plurality of subpixels in the complementary color surrounding the subpixel position. 
     The method for determining the color subcomponents of the plurality of subpixels in the complementary color in proximity to the subpixel position will be described hereinafter. 
     Alternatively, when a subpixel at a subpixel position is a subpixel in a complementary color, the step of performing the display compensation at the subpixel position under the average effect of the plurality of subpixels in the complementary color in proximity to the subpixel position includes obtaining complementary subcomponents of the subpixel at the subpixel position and the plurality of subpixels in the complementary color surrounding the subpixel position, through multiplying display scale coefficients corresponding to the subpixel at the subpixel position and the plurality of subpixels in the complementary color surrounding the subpixel position by the complementary component of the complementary color to be displayed at the subpixel position. When a subpixel at a subpixel position is not a subpixel in the complementary color, the step of performing the display compensation at the subpixel position under the average effect of the plurality of subpixels in the complementary color in proximity to the subpixel position includes obtaining complementary subcomponents of the plurality of subpixels in the complementary color surrounding the subpixel position, through multiplying display scale coefficients corresponding to the plurality of subpixels in the complementary color surrounding the subpixel position by the complementary component of the complementary color to be displayed at the subpixel position. The display scale coefficient of each subpixel in the complementary color in proximity to the subpixel position is associated with a distance between the subpixel in the complementary color and the subpixel position. 
     In the embodiments of the present disclosure, a region where a plurality of subpixels surrounding the subpixel position may be called as a sampling region of the subpixel position, and the plurality of subpixels may be called as common subpixels. 
     The selection of the sampling region will be described hereinafter. 
     Alternatively, when a color component of a primitive color identical to a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position, the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes: 
     eight subpixels in the primitive color identical to the color of the subpixel at the subpixel position in closest proximity to the subpixel position, which are arranged at both sides of a row in which the subpixel position is located, and in the upper three rows and the lower three rows adjacent to the row in which the subpixel position is located, and which form a parallelogram; or 
     eight subpixels in the primitive color identical to the color of the subpixel at the subpixel position in closest proximity to the subpixel position, which are arranged at both sides of a column in which the subpixel position is located, and in the left five columns and the right five columns adjacent to the column in which the subpixel position is located, and which form a parallelogram; or 
     three subpixels in the primitive color identical to the color of the subpixel at the subpixel position surrounding the subpixel position, which form together with the subpixel at the subpixel position a diamond; or 
     two subpixels in the primitive color identical to the color of the subpixel at the subpixel position surrounding the subpixel position, which form together with the subpixel at the subpixel position an equilateral triangle; or 
     two subpixels in the primitive color identical to the color of the subpixel at the subpixel position surrounding the subpixel position, which form together with the subpixel at the subpixel position an isosceles triangle. 
     Alternatively, when a color component of a primitive color different from a color of a subpixel at a subpixel position is desired to be displayed at the subpixel position, the plurality of subpixels in the identical primitive color in proximity to the subpixel position includes: 
     eight subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     four subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     three subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form an equilateral triangle that at least partially overlaps the subpixel position; or 
     three subpixels in the primitive color identical to the to-be-displayed color component surrounding the subpixel position, which form an isosceles triangle that at least partially overlaps the subpixel position. 
     Alternatively, when a subpixel at a subpixel position is a subpixel in a complementary color, the plurality of subpixels in the complementary color in proximity to the subpixel position includes: 
     eight subpixels in the complementary color in closest proximity to the subpixel position, which are arranged at both sides of a row in which the subpixel position is located, and in the upper three rows and the lower three rows adjacent to the row in which the subpixel position is located, and which form a parallelogram; or 
     eight subpixels in the complementary color in closest proximity to the subpixel position, which are arranged at both sides of a column in which the subpixel position is located, and in the left five columns and the right five columns adjacent to the column in which the subpixel position is located, and which form a parallelogram; or 
     three subpixels in the complementary color surrounding the subpixel position, which form together with the subpixel at the subpixel position a diamond; or 
     two subpixels in the complementary color surrounding the subpixel position, which form together with the subpixel at the subpixel position an equilateral triangle; or 
     two subpixels in the complementary color surrounding the subpixel position, which form together with the subpixel at the subpixel position an isosceles triangle. 
     Alternatively, when a subpixel at a subpixel position is not a subpixel in a complementary color, the plurality of subpixels in the complementary color surrounding the subpixel position includes: 
     eight subpixels in the complementary color surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     four subpixels in the complementary color surrounding the subpixel position, which form a diamond that surrounds the subpixel position or at least partially overlaps the subpixel position; or 
     three subpixels in the complementary color surrounding the subpixel position, which form an equilateral triangle that at least partially overlaps the subpixel position; or 
     three subpixels in the complementary color surrounding the subpixel position, which form an isosceles triangle that at least partially overlaps the subpixel position. 
     Referring to  FIG. 5 , which shows a sampling region for a green subpixel in the repeating unit according to the first embodiment of the present disclosure, a green component is displayed at the green subpixel R 10 L 7  position, and the green subpixels in proximity to the green subpixel position include eight green subpixels (R 9 L 4 , R 7 L 6 , R 5 L 8 , R 8 L 9 , R 11 L 10 , R 13 L 8 , R 15 L 6  and R 12 L 5 ) in closest proximity to the green subpixel R 10 L 7 , which are arranged at both sides of the row where the green subpixel R 10 L 7  is located, in up and down three rows closest to the row where the green subpixel R 10 L 7  is located. These eight green subpixels are also called as common subpixels, which form a diamond sampling region surrounding the green subpixel. The eight common green subpixels in this sampling region, together with the green subpixel R 10 L 7 , output a signal at a position where the green subpixel R 10 L 7  is located. This quadrilateral sampling region including eight common subpixels is of a large common region, so it is able to display a continuous image in a better manner. 
       FIGS. 6 and 8  show the conditions where a color component in a primitive color identical to a color of a subpixel at a subpixel position is to be displayed at the subpixel position. To be specific,  FIG. 6  shows a sampling region for a blue subpixel in the repeating unit according to the first embodiment of the present disclosure, and  FIG. 8  shows a sampling region for a red subpixel in the repeating unit according to the first embodiment of the present disclosure. Similar to the green subpixel R 10 L 7  in  FIG. 5 , sampling regions for a blue subpixel R 11 L 8  and a red subpixel R 9 L 8  each include eight common subpixels. 
     Of course, when a color component in a primitive color different from a color of a subpixel at a subpixel position is to be displayed at the subpixel position, the sampling regions in  FIGS. 5, 6 and 8  may also be used. For example, a green component may also be displayed at a white subpixel R 8 L 6  position in the sampling region in  FIG. 5 , and the eight green subpixels in the sampling region in  FIG. 5  may be used as common subpixels. 
       FIG. 7  is a schematic view showing a sampling region for a white subpixel in the repeating unit according to the first embodiment of the present disclosure. In this embodiment, a white component is displayed at a white subpixel R 10 L 8  position, and the plurality of subpixels in the complementary color in proximity to the white subpixel position includes eight white subpixels in closest proximity to the white subpixel R 10 L 8 , which are arranged at both sides of a column where the white subpixel R 10 L 8  is located, and in left and right five columns closest to the column where the white subpixel R 10 L 8  is located. These eight white subpixels may also be called as common subpixels, which form a diamond sampling region surrounding the white subpixel R 10 L 8 . 
     Of course, when a subpixel at a subpixel position is not a white subpixel, the plurality of subpixels in the complementary color in proximity to the white subpixel position may also include the white subpixels in the sampling region in  FIG. 7 . For example, at a red subpixel R 8 L 8  position in the sampling region in  FIG. 7 , the white subpixels in the sampling region in  FIG. 7  may also be used as the complementary subpixels. 
     In the other embodiments of the present disclosure, the sampling region for the subpixels may be of any other shapes, which will be described hereinafter. 
     Referring to  FIG. 9 , which is a schematic view showing a sampling region for a green subpixel in the repeating unit according to the second embodiment of the present disclosure, a green component is displayed at the white subpixel R 10 L 7  position, and the green subpixels in proximity to the green subpixel position include three green subpixels (R 13 L 8 , R 15 L 6  and R 12 L 5 ) surrounding the green subpixel position. The green subpixel R 10 L 7  forms together with the three green subpixels (R 13 L 8 , R 15 L 6  and R 12 L 5 ) a diamond. The green subpixels in this sampling region output a signal at a position where the green subpixel R 10 L 7  is located. The quadrilateral sampling region including three common subpixels is of a small area, so it is able to determine a virtual position accurately. 
     Referring to  FIG. 10 , which is a schematic view showing a sampling region for a green subpixel in the repeating unit according to the third embodiment of the present disclosure, a green component is displayed at the green subpixel R 10 L 7  position, and the green subpixels in proximity to the green subpixel position include two green subpixels (R 13 L 8  and R 12 L 5 ) surrounding the green subpixel position. The green subpixel R 10 L 7  forms together with the two green subpixels (R 13 L 8  and R 12 L 5 ) an equilateral triangle, and all the green subpixels in the sampling region output a signal at a position where the green subpixel R 10 L 7  is located. The triangular sampling region including two common subpixels is of a very small area, so it is able to perform the sampling at a boundary, thereby to provide an image with a fine edge. 
     Referring to  FIG. 11 , which is a schematic view showing a sampling region for a green subpixel in the repeating unit according to the fourth embodiment of the present disclosure, a green component is displayed at the green subpixel R 10 L 7  position, and the green subpixels in proximity to the green subpixel position include two green subpixels (R 12 L 5  and R 15 L 6 ) surrounding the green subpixel position. The green subpixel R 10 L 7  forms together with the two green subpixels (R 12 L 5  and R 15 L 6 ) an isosceles triangle. All the green subpixels in the sampling region output a signal at a position where the green subpixel R 10 L 7  is located. Identically, the triangular sampling region including two common subpixels is of a very small area, so it is able to perform the sampling at a boundary, thereby to provide an image with a fine edge. 
     Identically, the sampling regions in  FIGS. 9-11  may also be used for the conditions where a color component in a primitive color different from a color of a subpixel at a subpixel position is to be displayed at the subpixel position, and for the selection of the sampling regions of the subpixels in the complementary color. 
     The sampling regions in the above embodiments are each of a regular shape, and of course, in the other embodiment, the sampling regions may each be of any other shape, e.g., an irregular shape, which are not particularly defined herein. 
     Of course, the selection of the sampling region is not limited to the above. During the actual display, the sampling region including the subpixels which may perform the display in a most convenient manner and which do not cause an oversized operation burden may be selected in accordance with the practical need. During the selection of a sampling region, the more the subpixels included in the sampling region and the more evenly the subpixels are distributed, the better the display effect and the greater the operation burden. In contrast, the fewer the subpixels included in the sampling region, the less the operation burden and the worse the display effect. In addition, different colors are desired to be displayed at each subpixel position, so it is required to select the sampling region in such a manner as to display an image continuously. Usually, the sampling region of a regular shape, e.g., a diamond, a parallelogram or a triangle, may be selected. 
     For the subpixel positions at an edge portion of the entire pixel structure, the situation is different during the selection of the sampling region as compared with the subpixel position at the center of the entire pixel structure. When it is impossible to form a complete sampling region, it is required to modify an edge of image by other edge modification methods during the display, which is not particularly defined herein. 
     Of course, in the embodiments of the present disclosure, the signal may be outputted by the subpixels in the sampling region through any other methods, which are not particularly defined herein. 
     In the embodiments of the present disclosure, apart from the shape of the sampling region, the arrangement mode of the four subpixels in the repeating unit may also adversely affect the image display effect. 
       FIG. 12  is a schematic view showing an arrangement mode of the four subpixels in the repeating unit according to one embodiment of the present disclosure, and  FIG. 13  is a schematic view showing a situation where the sampling regions for the four subpixels in the repeating unit in  FIG. 12  overlap each other. As shown in  FIG. 13 , overlapping regions between the sampling region for the subpixel in one color and the sampling regions for the subpixels in the other three colors are the same. Through this arrangement mode, within a very small display region, it is able for the sampling regions for the four subpixels to output a color image. The image displayed in this subpixel output mode has a relatively even color, so it is a preferred output mode. 
       FIG. 14  is another schematic view showing an arrangement mode of the four subpixels in the repeating unit according to one embodiment of the present disclosure, and  FIG. 15  is a schematic view showing a situation where the sampling regions for the four subpixels in the repeating unit in  FIG. 14  overlap each other. As shown in  FIG. 15 , an overlapping region between the sampling regions for the four subpixels is of a smaller area, as compared with the subpixel output mode in  FIG. 13 . 
       FIG. 16  is yet another schematic view showing an arrangement mode of the four subpixels in the repeating unit according to one embodiment of the present disclosure, and  FIG. 17  is a schematic view showing a situation where the sampling regions for the four subpixels in the repeating unit in  FIG. 16  overlap each other. As shown in  FIG. 16 , an overlapping region between the sampling regions for the four subpixels is of a smaller area, as compared with the subpixel output mode in  FIG. 13 . 
     The display panel in the embodiments of the present disclosure may be an organic light-emitting diode (OLED) display panel, and each subpixel includes an OLED (a light-emitting unit). The OLEDs may emit light in different colors (through different organic light-emitting layers), and the color of the light emitted by each OLED is identical to the color of the subpixel including the OLED. For example, the OLED included in a red subpixel emits a red light beam. 
     The display panel may also be a liquid crystal display (LCD). The LCD itself does not emit light, and it filters light from a backlight source so as to display an image. The subpixels include color filter films in different colors, and a light beam passing through the color filter film may have a corresponding color. The color of the color filter film included in each subpixel is identical to the color of the subpixel. For example, the color filter film included in a red subpixel is in red. 
     The above are merely the preferred embodiments of the present disclosure. It should be appreciated that, a person skilled in the art may make further modifications and improvements without departing from the principle of the present disclosure, and these modifications and improvements shall also fall within the scope of the present disclosure.