Patent Publication Number: US-2022238609-A1

Title: Pixel structure, display panel, and display device

Description:
This application claims priority to Chinese Patent Application No. 201910459235.X filed with the CNIPA on May 29, 2019, and Chinese Patent Application No. 201910458249.X filed with the CNIPA on May 29, 2019, disclosure of which are incorporated herein by reference in their entireties. 
     TECHNICAL FIELD 
     The present disclosure relates to the field of display technology and, in particular, to a pixel structure, a display panel and a display device. 
     BACKGROUND 
     Organic light-emitting display devices have advantages of self-luminescence, no backlight, low power consumption, high brightness and the like, which are favored by users. 
     In the related art, a pixel structure of the organic light-emitting display device includes a standard arrangement mode, a triangular arrangement mode and the like. In the above pixel arrangement modes, sub-pixels of different colors are juxtaposed, so that a distance between light-emitting centers of the sub-pixels of different colors is relatively large, thereby affecting color mixture of light of different colors and resulting in poor display effect of the display device. To solve the above problem, a pixel structure is provided. In this pixel structure, the sub-pixels of different colors constitute a nested structure, and the organic light-emitting display device generally includes sub-pixels of three different colors. After adopting the above nested structure, the sub-pixels of three different colors are nested, so that the outermost sub-pixel has a small width on the premise of ensuring an area ratio of the sub-pixels, and a process implementation area of this sub-pixel is small, causing an increased difficulty in preparing the organic light-emitting display device. 
     SUMMARY 
     The present disclosure provides a pixel structure, a display panel and a display device to improve the display effect of the display device and reduce the preparation difficulty of the display device. 
     Embodiments of the present disclosure provide a pixel structure. The pixel structure includes multiple first sub-pixel groups, each of the multiple first sub-pixel groups includes a first sub-pixel and at least one second sub-pixel, the first sub-pixel is disposed around the at least one second sub-pixel, and an emission color of the first sub-pixel is different from an emission color of any one of the at least one second sub-pixel. 
     An embodiment of the present disclosure also provides a display panel. The display panel includes the pixel structure described above. 
     An embodiment of the present disclosure also provides a display device. The display device includes the display panel described above. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a schematic diagram of a pixel structure provided by an embodiment of the present disclosure; 
         FIG. 2  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 3  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 4  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 5  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 6  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 7  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 8  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 9  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 10  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 11  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 12  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 13  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 14  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 15  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 16  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 17  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 18  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 19  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 20  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 21  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 22  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 23  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 24  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 25  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 26  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 27  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 28  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 29  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 30  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 31  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 32  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 33  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure; 
         FIG. 34  is a structure diagram of a display panel provided by an embodiment of the present disclosure; 
         FIG. 35  is a sectional view taken along a dotted line CD in  FIG. 34 ; and 
         FIG. 36  is a structure diagram of a display device provided by an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Implementations, structures, features and effects of a pixel structure, a display panel and a display device provided by the present disclosure are described below with reference to the drawings and embodiments. 
       FIG. 1  is a schematic diagram of a pixel structure provided by an embodiment of the present disclosure. As shown in  FIG. 1 , the pixel structure includes multiple first sub-pixel groups  100 . Each of the multiple first sub-pixel groups  100  includes a first sub-pixel  110  and at least one second sub-pixel  120 . The first sub-pixel  110  is disposed around the at least one second sub-pixel  120 , and an emission color of the first sub-pixel  110  is different from an emission color of any second sub-pixel  120 . 
     The pixel structure provided by the embodiment of the present disclosure includes multiple first sub-pixel groups, each of the multiple first sub-pixel groups includes a first sub-pixel and at least one second sub-pixel, the first sub-pixel is disposed around the at least one second sub-pixel, and an emission color of the first sub-pixel is different from an emission color of any one of the at least one second sub-pixel, so that sub-pixels of different emission colors are in a nested relationship, which facilitates color mixture of light of different colors emitted by the multiple sub-pixels during the display process, and further improves the display effect of the display device. In addition, in the above nested relationship, the sub-pixel at a periphery has a relatively large width, and thus a process implementation area of this sub-pixel is relatively large, which facilitates reducing the preparation difficulty of the display device. 
     The present disclosure is described in conjunction with the drawings. In a case of describing the embodiments of the present disclosure, for ease of description, schematic diagrams illustrating structures of devices and components are not partially enlarged to a general proportional scale. 
     The schematic diagrams are merely illustrative and are not intended to limit the scope of the present disclosure. In addition, the actual manufacturing includes three-dimension spatial sizes: length, width and height. An embodiment of the present disclosure further provides a pixel structure. The pixel structure includes at least multiple first sub-pixel groups, each of the multiple first sub-pixel groups includes a first sub-pixel and at least one second sub-pixel, the first sub-pixel is disposed around the at least one second sub-pixel, an emission color of the first sub-pixel is a first color, and an emission color the at least one second sub-pixel is a second color. 
     The pixel structure provided by the embodiment of the present disclosure includes at least multiple first sub-pixel groups, each of the multiple first sub-pixel groups includes the first sub-pixel and at least one second sub-pixel, the first sub-pixel is disposed around the at least one second sub-pixel, the emission color of the first sub-pixel is the first color, and the emission color of the at least one second sub-pixel is the second color, so that sub-pixels of two different emission colors are in a nested relationship, which facilitates color mixture of light of different colors emitted by the multiple sub-pixels during the display process, and further improves the display effect of the display device. In addition, in the above nested relationship, the sub-pixel at a periphery has a relatively large width, and thus a process implementation area of this sub-pixel is relatively large, which facilitates reducing the preparation difficulty of the display device. 
       FIG. 2  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. As shown in  FIG. 2 , the pixel structure includes at least multiple first sub-pixel groups  100 . Each of the multiple first sub-pixel groups  100  includes a first sub-pixel  110  and at least one second sub-pixel  120 . The first sub-pixel  110  is disposed around the at least one second sub-pixel  120 , and an emission color of the first sub-pixel  110  is a first color and an emission color of the at least one second sub-pixel  120  is a second color. 
     In this embodiment, in  FIG. 2 , the first sub-pixel group  100  includes one second sub-pixel  120 , which is taken as an example for description and is not intended to limit the number of second sub-pixels  120  in the first sub-pixel group  100 . In other implementations of this embodiment, the number of second sub-pixels  120  in the first sub-pixel group  100  may be greater than or equal to two. Exemplarily,  FIG. 3  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 3  is similar to the pixel structure shown in  FIG. 2  except that the first sub-pixel group  100  in  FIG. 3  includes two second sub-pixels  120 . 
     In an embodiment, when the number of second sub-pixels  120  in the first sub-pixel group  100  is greater than or equal to two, the arrangement mode of multiple second sub-pixels  120  in a same first sub-pixel group  100  is not limited in this embodiment. In addition, in this embodiment, other structures in the pixel structure in addition to the first sub-pixel group  100  are not limited. Any solution that satisfies the following condition falls within the scope of this embodiment: in the first sub-pixel group  100 , the first sub-pixel  110  is disposed around at least one second sub-pixel  120  and the emission color of the first sub-pixel  110  is different from the emission color of the at least one second sub-pixel  120 . 
     The pixel structure provided by the embodiment of the present disclosure at least includes multiple first sub-pixel groups  100 , each of the multiple first sub-pixel groups  100  includes the first sub-pixel  110  and at least one second sub-pixel  120 , the first sub-pixel  110  is disposed around the at least one second sub-pixel  120 , the emission color of the first sub-pixel  110  is a first color, and the emission color of the second sub-pixel is a second color, so that sub-pixels of two different emission colors are in a nested relationship, which facilitates color mixture of light of different colors emitted by the multiple sub-pixels during the display process, and further improves the display effect of the display device. In addition, in the above nested relationship, the sub-pixel at a periphery has a relatively large width, and thus a process implementation area of this sub-pixel is relatively large, which facilitates reducing the preparation difficulty of the display device. 
     Exemplarily, referring to  FIG. 2 , the pixel structure further includes multiple third sub-pixels  130 , where an emission color of the multiple third sub-pixels  130  is a third color; and in a first direction X, one first sub-pixel group  100  and one third sub-pixel  130  adjacent to the one first sub-pixel group  100  constitute one pixel unit  10 , and multiple pixel units  10  are arranged in an array. 
     In this embodiment, the first sub-pixel  110 , the second sub-pixel  120  and the third sub-pixel  130  have different emission colors, and light of different colors emitted by the first sub-pixel  110 , the second sub-pixel  120  and the third sub-pixel  130  are mixed to obtain light of a target color. For example, the light of the target color may be white. 
     In an embodiment, any one of the first color, the second color and the third color may be one of red, green and blue, and the first color, the second color and the third color are different colors. 
     In an embodiment, red, green and blue are three primary colors of light, and red, green and blue of different intensities can be mixed to obtain light of multiple colors. Therefore, the above arrangement enables the display device to display various colors and enrich the display color of the display device. 
     This embodiment does not limit the colors of the first sub-pixel  110 , the second sub-pixel  120  and the third sub-pixel  130 , and any solution satisfying the above color arrangement falls within the scope of this embodiment. 
     Exemplarily, the emission color of the first sub-pixel  110  may be red, the light-emitting of the second sub-pixel  120  may be green, and the light-emitting of the third sub-pixel  130  may be blue. An area of the third sub-pixel  130  may be larger than an area of the first sub-pixel  110 , and the area of the first sub-pixel  110  may be larger than an area of the second sub-pixel  120 . In an embodiment, an area ratio of the first sub-pixel  110 , the second sub-pixel  120  and the third sub-pixel  130  may be 10:9:18, thereby achieving a better display effect. The above ratio relationship is merely illustrative and not restrictive. A designer can reasonably adjust the area ratio of the multiple sub-pixels according to actual needs, which is not limited in this embodiment. 
     In an embodiment, referring to  FIG. 2 , two adjacent pixel units  10  constitute a pixel unit group  1  in a direction Y vertical to the first direction X, and two pixel units  10  in a same pixel unit group  1  have a same structure. 
       FIG. 4  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. As shown in  FIG. 4 , in a direction Y vertical to a first direction X, two adjacent pixel units  10  constitute a pixel unit group  1 , and arrangement orders of a first sub-pixel group  100  and a third sub-pixel  130  in two pixel units  10  in a same pixel unit group  1  are different in the first direction X. 
     In this embodiment, the pixel unit group  1  is a minimum repeating unit in the pixel structure, and multiple pixel unit groups  1  are repeatedly arranged to constitute the pixel structure. 
     In an embodiment, as shown in  FIG. 4 , the arrangement orders being different refers to that the first sub-pixel group  100  and the third sub-pixel  130  in one pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X, and the third sub-pixel  130  and the first sub-pixel group  100  in another pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X. That is, the first sub-pixel groups  100  in the two pixel units  10  in the same pixel unit group  1  have an identical structure, the third sub-pixels  130  in the two pixel units  10  in the same pixel unit group  1  also have an identical structure, and only the arrangement orders of the first sub-pixel group and the third sub-pixel are different. 
     Such structure shown in  FIG. 4  prevents sub-pixels of a same color from being arranged adjacently in the direction Y vertical to the first direction X, thereby reducing the probability of the occurrence of bright lines and facilitating improving the display effect of the display device. 
       FIG. 5  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 6  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 5  is similar to the pixel structure shown in  FIG. 2 , and the pixel structure shown in  FIG. 6  is similar to the pixel structure shown in  FIG. 4  except that in  FIGS. 5 and 6 , two pixel units  10  in a same pixel unit group  1  are misaligned in the first direction X and the misalignment width d is less than a width of a first sub-pixel group  100 . 
     In this embodiment, the misalignment width d refers to a distance between geometric centers of the two pixel units  10  in the same pixel unit group  1  in the first direction X, and the width of the first sub-pixel group  100  refers to a length of the first sub-pixel group  100  in the first direction X. 
     In this embodiment, such arrangement enables sub-pixels of different emission colors to be more compactly arranged, which facilitates color mixture of light of different colors emitted by multiple sub-pixels and further improves the display effect of the display device. 
       FIG. 7  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 8  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 7  is similar to the pixel structure shown in  FIG. 2  and the pixel structure shown in  FIG. 8  is similar to the pixel structure shown in  FIG. 4  except that in  FIGS. 7 and 8 , the second sub-pixels  120  are circular in shape. 
     In an embodiment, in a case where the light-emitting functional layer of the sub-pixel is formed by using an inkjet printing technology, a droplet of the light-emitting functional layer material is circular in shape, and forms a circular film after dropping directly. In a case where the formed film is in other shapes other than the circle, the liquid light-emitting functional layer material needs to flow. Thus, the second sub-pixel  120  is configured to be circular in shape so that the second sub-pixel  120  can have a same shape as the droplet of the light-emitting functional layer material, and the liquid light-emitting functional layer material does not need to be further flowed and molded. In this manner, the formed film of the light-emitting functional layer material has a better uniformity. 
       FIG. 9  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. As shown in  FIG. 9 , the pixel structure includes multiple first sub-pixel groups  100 . Each of the multiple first sub-pixel groups  100  includes a first sub-pixel  110  and at least one second sub-pixel  120 . The first sub-pixel  110  is disposed around the at least one second sub-pixel  120 , an emission color of the first sub-pixel  110  is a first color, and an emission color of the at least one second sub-pixel  120  is a second color. In an embodiment, the pixel structure includes multiple second sub-pixel groups  200 , each of the multiple second sub-pixel groups  200  includes a fourth sub-pixel  210  and at least one fifth sub-pixel  220 , the fourth sub-pixel  210  is disposed around the at least one fifth sub-pixel  220 , an emission color of the fourth sub-pixel  210  is a fourth color, and an emission color of the at least one fifth sub-pixel  220  is a fifth color; and in a first direction, a first sub-pixel group  100  and a second sub-pixel group  200  adjacent to the first sub-pixel group  100  constitute a pixel unit  10 , and multiple pixel units  10  are arranged in an array. 
     In this embodiment, such arrangement enables the pixel structure to include sub-pixels of four colors, and sub-pixels of every two colors form a nested structure, so that the sub-pixels of four different colors in the pixel unit  10  are arranged more compact, which facilitates the improvement of the display effect of the display device. 
     In an embodiment, any one of the first color, the second color and the fourth color is selected from one of red, green and blue, the fifth color is any one of white or yellow, and the first color, the second color, the fourth color and the fifth color are different colors. 
     Colors of the first sub-pixel  110 , the second sub-pixel  120 , the fourth sub-pixel  210  and the fifth sub-pixel  220  are not limited by this embodiment and any solution satisfying the above color arrangement falls within the scope of this embodiment. 
     In an embodiment, the emission color of the first sub-pixel  110  and the emission color of the fourth sub-pixel  210  each is selected from one of blue and red, the emission color of the first sub-pixel  110  is different from the emission color of the fourth sub-pixel  210 , and the emission color of the second sub-pixel  120  is green, where an area of the fifth sub-pixel  220  having an emission color of white or yellow is larger than an area of the second sub-pixel  120  having an emission color of green, and the area of the second sub-pixel  120  is larger than an area of the first sub-pixel  110  and an area of the fourth sub-pixel  210 . In an embodiment, in a case where the emission color of the first sub-pixel  110  is red, an area ratio of the first sub-pixel  110 , the second sub-pixel  120 , the fourth sub-pixel  210  and the fifth sub-pixel  220  may be 10:12:9:18; and in a case where the emission color of the first sub-pixel  110  is blue, the area ratio of the first sub-pixel  110 , the second sub-pixel  120 , the fourth sub-pixel  210 , and the fifth sub-pixel  220  may be 9:12:10:18. The above ratio relationship is merely illustrative and not restrictive. A designer can reasonably adjust the area ratio of the multiple sub-pixels according to actual needs, which is not limited in this embodiment. 
     In an embodiment, referring to  FIG. 9 , two adjacent pixel units  10  constitute a pixel unit group  1  in a direction Y vertical to the first direction X, and two pixel units  10  in the same pixel unit group  1  have the same structure. 
       FIG. 10  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 10  is similar to the pixel structure shown in  FIG. 9  except that arrangement orders of a first sub-pixel group  100  and a second sub-pixel group  200  in two pixel units  10  in a same pixel unit group  1  in a first direction X are different. 
     In this embodiment, the pixel unit group  1  is a minimum repeating unit in the pixel structure, and multiple pixel unit groups  1  are repeatedly arranged to constitute the pixel structure. 
     In an embodiment, as shown in  FIG. 10 , the arrangement orders being different refers to that the first sub-pixel group  100  and the second sub-pixel group  200  in one pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X, and the second sub-pixel group  200  and the first sub-pixel group  100  in another pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X. That is, the first sub-pixel groups  100  in the two pixel units  10  in the same pixel unit group  1  have an identical structure, the second sub-pixel group  200  in the two pixel units  10  in the same pixel unit group  1  also have an identical structure, and only the arrangement orders of the first sub-pixel group and the second sub-pixel group are different. 
     Such structure shown in  FIG. 10  prevents sub-pixels of a same color from being arranged adjacently in the first direction or the direction Y vertical to the first direction X, thereby reducing the probability of the occurrence of bright lines and facilitating improving the display effect of the display device. 
       FIG. 11  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 12  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 11  is similar to the pixel structure shown in  FIG. 9 , and the pixel structure shown in  FIG. 12  is similar to the pixel structure shown in  FIG. 10  except that in  FIGS. 11 and 12 , two pixel units  10  in a same pixel unit group  1  are misaligned in a first direction X and a misalignment width d is less than a width of a first sub-pixel group  100 . 
     In this embodiment, such arrangement enables sub-pixels of different emission colors to be more compactly arranged, which facilitates color mixture of light of different colors emitted by multiple sub-pixels and further improves the display effect of the display device. 
     In an embodiment, as shown in  FIGS. 5, 6, 11 and 12 , the misalignment width d may be equal to a half of a width of the first sub-pixel group  100 . 
     Experiments showed that in a case where the misalignment width d is equal to a half of the width of the first sub-pixel group  100 , sub-pixels of four different colors in the pixel unit  10  have the highest compactness and the best color mixing effect, thereby enabling the display device to have a better display effect. 
       FIG. 13  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 14  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 13  is similar to the pixel structure shown in  FIG. 9 , and the pixel structure shown in  FIG. 14  is similar to the pixel structure shown in  FIG. 10  except that in  FIGS. 13 and 14 , second sub-pixels  120  are circular in shape. 
     In this embodiment, such arrangement enables the second sub-pixel  120  have the same shape as a droplet of the light-emitting functional layer material when the light-emitting functional layer material of the sub-pixel is formed by using an inkjet printing technology, and thus the formed film light-emitting functional layer material has a better uniformity, referring to the preceding related contents for details, which will not be repeated herein. 
       FIG. 15  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 16  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 15  is similar to the pixel structure shown in  FIG. 9 , and the pixel structure shown in  FIG. 16  is similar to the pixel structure shown in  FIG. 10  except that in  FIGS. 15 and 16 , fifth sub-pixels  220  are circular in shape. 
     In this embodiment, such arrangement enables the fifth sub-pixel  220  to have the same shape as a droplet of the light-emitting functional layer material when the light-emitting functional layer material of the sub-pixel is formed by using an inkjet printing technology, and thus the formed film of the light-emitting functional layer material has a better uniformity, referring to the preceding related contents for details, which will not be not repeated herein. 
       FIG. 17  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 18  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 17  is similar to the pixel structure shown in  FIG. 9 , and the pixel structure shown in  FIG. 18  is similar to the pixel structure shown in  FIG. 10  except that in  FIGS. 17 and 18 , second sub-pixels  120  and fifth sub-pixels  220  are all circular in shape. 
     In this embodiment, such arrangement enables the second sub-pixel  120  and the fifth sub-pixel  220  to have the same shape as a droplet of the light-emitting functional layer material when the light-emitting functional layer material of the sub-pixel is formed by using an inkjet printing technology, thus the formed film of the light-emitting functional layer material has a better uniformity, referring to the preceding related contents for details, which will not be repeated herein. 
     Embodiments of the present disclosure further provide a pixel structure. The pixel structure includes multiple first sub-pixel groups. Each of the multiple first sub-pixel groups includes a first sub-pixel and at least two second sub-pixels, the at least two second sub-pixels have different emission colors, and the first sub-pixel is disposed around the at least two second sub-pixels, an emission color of the first sub-pixel is different from an emission color of any second sub-pixel. 
     The pixel structure provided by the embodiment of the present disclosure includes at least multiple first sub-pixel groups, each of the multiple first sub-pixel groups includes the first sub-pixel and at least two second sub-pixels, the at least two second sub-pixels have different emission colors, the first sub-pixel is disposed around the at least two second sub-pixels, the emission color of the first sub-pixel is different from the emission color of any second sub-pixel, so that the first sub-pixel and any second sub-pixel which have different emission colors in the same first sub-pixel group are in a nested relationship, which facilitates color mixture of light of different colors emitted by the multiple sub-pixels during the display process, and further improves the display effect of the display device. In addition, in the above nested relationship, the sub-pixel at a periphery has a relatively large width, thus a process implementation area of this sub-pixel is relatively large, which facilitates reducing the preparation difficulty of the display device. 
     As shown in  FIG. 3 , the pixel structure includes multiple first sub-pixel groups  100 , each of the multiple first sub-pixel groups  100  includes a first sub-pixel  110  and at least two second sub-pixels  120 , the at least two second sub-pixels  120  have different emission colors, the first sub-pixel  110  is disposed around the at least two second sub-pixels  120  and an emission color of the first sub-pixel  110  is different from an emission color of any second sub-pixel  120 . 
     In this embodiment, in  FIG. 3 , the first sub-pixel group  100  includes two second sub-pixels  120 , which is taken as an example for description and is not intended to limit the number of second sub-pixels  120  in the first sub-pixel group  100 . In other implementations of this embodiment, the number of second sub-pixels  120  in the first sub-pixel group  100  may be greater than or equal to three. 
     The arrangement mode of at least two second sub-pixels  120  in the same first sub-pixel group  100  is not limited in this embodiment. In addition, other structures in the pixel structure other than the first sub-pixel group  100  is not limited in this embodiment. In an embodiment, any solution that satisfies the following condition falls within the scope of this embodiment: in the same first sub-pixel group  100 , the first sub-pixel  110  is disposed around at least two second sub-pixels  120 , the emission colors of the at least two second sub-pixels  120  are different, the emission color of the first sub-pixel  110  is different from the emission color of any second sub-pixel  120 . 
     In an embodiment, multiple sub-pixels in the first sub-pixel group  100  have different emission colors, so that the sub-pixels of multiple colors are compactly arranged, and light of different colors emitted by the multiple sub-pixels is easier to mix, thereby avoiding the occurrence of the polarization phenomenon. In addition, the first sub-pixel  110  is disposed around multiple second sub-pixels  120 , and the multiple second sub-pixels  120  form a nested structure with only the first sub-pixel  110 . A width of the first sub-pixel  110  at a periphery of the nested structure may be made larger, so a process implementation area of the first sub-pixel  110  is larger correspondingly. 
     The pixel structure provided by this embodiment at least includes multiple first sub-pixel groups  100 , each of the multiple first sub-pixel groups  100  includes the first sub-pixel  110  and at least two second sub-pixels  120 , the at least two second sub-pixels  120  have different emission colors, the first sub-pixel  110  is disposed around the at least two second sub-pixels  120 , the emission color of the first sub-pixel  110  is different from the emission color of any second sub-pixel  120 , so that the first sub-pixel  110  and any second sub-pixel  120  which have different emission colors in the same first sub-pixel group  100  are in a nested relationship, which facilitates color mixture of light of different colors emitted by the multiple sub-pixels during the display process, and further improves the display effect of the display device. In addition, in the above nested relationship, the sub-pixel at a periphery has a relatively large width, thus a process implementation area of this sub-pixel is relatively large, which facilitates reducing the preparation difficulty of the display device. 
     Exemplarily, referring to  FIG. 3 , the pixel structure further includes multiple third sub-pixels  130 , an emission color of the third sub-pixel is different from an emission color of the first sub-pixel  110 , and in a first direction X, the first sub-pixel group  100  and the third sub-pixel  130  adjacent to the first sub-pixel group  100  constitute a pixel unit  10 , and multiple pixel units  10  are arranged in an array. 
     In this embodiment, the emission color of the third sub-pixel  130  may be different from or the same as the emission color of any second sub-pixel  120 , which is not limited in this embodiment. 
     In an embodiment, the first sub-pixel group  100  includes two second sub-pixels  120  of different emission colors, and the pixel unit  10  includes sub-pixels of four emission colors. 
     In this embodiment, in the pixel structure obtained by the above arrangement mode, the pixel unit  10  includes one first sub-pixel  110 , two second sub-pixels  120  and one third sub-pixel  130 , that is, the pixel unit  10  includes four sub-pixels, and each of the four sub-pixels has a different emission color. 
     Exemplarily, the above four colors are selected from red, green, blue and any one of white or yellow. 
     In an embodiment, red, green and blue are three primary colors of light, and red, green and blue of different intensities can be mixed to obtain light of multiple colors, so that the display device can display various colors and the display color of the display device can be enriched. The arrangement of white sub-pixels or yellow sub-pixels can improve the brightness and the color expression of the display panel, and the increased transmittance improves the gray scale and the light-dark expression of the display device itself, which is beneficial for further enhancing the display effect of the display device. 
     Colors of the first sub-pixel  110 , each second sub-pixel  120 , the third sub-pixel  130  are not limited by this embodiment and any solution satisfying the above color arrangement falls within the protection scope of this embodiment. 
     In an embodiment, referring to  FIG. 3 , two adjacent pixel units  10  constitute a pixel unit group  1  in a direction Y vertical to the first direction X, and two-pixel units  10  in the same pixel unit group  1  have a same structure. 
       FIG. 19  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 19  is different from the pixel structure shown in  FIG. 3  in that in  FIG. 19 , arrangement orders of a first sub-pixel group  100  and a third sub-pixel  130  in two pixel units  10  in a same pixel unit group  1  in a first direction are different. 
     In this embodiment, the pixel unit group  1  is a minimum repeating unit in the pixel structure, and multiple pixel unit groups  1  are repeatedly arranged to constitute the pixel structure. 
     In an embodiment, as shown in  FIG. 19 , the arrangement orders being different refers to that the first sub-pixel group  100  and the third sub-pixel  130  in one pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X, and the third sub-pixel  130  and the first sub-pixel group  100  in another pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X. That is, the first sub-pixel groups  100  in the two pixel units  10  in the same pixel unit group  1  have an identical structure, the third sub-pixels  130  in the two pixel units  10  in the same pixel unit group  1  also have an identical structure, and only the arrangement orders of the first sub-pixel group and the third sub-pixel are different. 
     Such structure shown in  FIG. 19  prevents sub-pixels of a same color from being arranged adjacently in a direction Y vertical to the first direction X, thereby reducing the probability of the occurrence of bright lines and facilitating improving the display effect of the display device. 
       FIG. 20  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 21  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 20  is similar to the pixel structure shown in  FIG. 3 , and the pixel structure shown in  FIG. 21  is similar to the pixel structure shown in  FIG. 19  except that in  FIGS. 20 and 21 , two pixel units  10  in a same pixel unit group  1  are misaligned in a first direction X and a misalignment width d is less than a width of a first sub-pixel group  100 . 
     In this embodiment, such arrangement enables sub-pixels of different emission colors to be more compactly arranged, which facilitates color mixture of light of different colors emitted by multiple sub-pixels and further improves the display effect of the display device. 
       FIG. 22  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 23  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 22  is similar to the pixel structure shown in  FIG. 3  and the pixel structure shown in  FIG. 23  is similar to the pixel structure shown in  FIG. 19  except that in  FIGS. 22 and 23 , the second sub-pixels  120  are circular in shape. 
     In an embodiment, in a case where the light-emitting functional layer of the sub-pixel is formed by using an inkjet printing technology, a droplet of the light-emitting functional layer material is circular in shape, and forms a circular film after dropping directly. In a case where the formed film is other shapes other than the circle, the liquid light-emitting functional layer material needs to flow. Thus, the second sub-pixel  120  is configured to be circular in shape so that the second sub-pixel  120  can have the same shape as the droplet of the light-emitting functional layer material, and the liquid light-emitting functional layer material does not need to be molded by further flowing so that the formed film of the light-emitting functional layer material has a better uniformity. 
       FIG. 24  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. As shown in  FIG. 24 , the pixel structure includes at least multiple first sub-pixel groups  100 . Each of the multiple first sub-pixel groups  100  includes a first sub-pixel  110  and at least two second sub-pixels  120 , and the at least two second sub-pixels  120  have different emission colors. The first sub-pixel  110  is disposed around the at least two second sub-pixels  120 , and an emission color of the first sub-pixel  110  is different from an emission color of any one of the at least two second sub-pixels  120 . In an embodiment, the pixel structure further includes multiple second sub-pixel groups  200 . Each of the multiple second sub-pixel groups  200  includes a fourth sub-pixel  210  and at least two fifth sub-pixels  220 , the fourth sub-pixel  210  is disposed around the at least two fifth sub-pixels  220 , an emission color of the fourth sub-pixel  210  is different from an emission color of any one of the at least two fifth sub-pixels  220 ; and in a first direction X, a first sub-pixel group  100  and a second sub-pixel group  200  adjacent to the first sub-pixel group  100  constitute a pixel unit  10 , and multiple pixel units  10  are arranged in an array. 
     In this embodiment, such arrangement enables the emission colors of the sub-pixels included in the pixel structure to be more abundant and the sub-pixels of different colors to be arranged more compact, which facilitates the improvement of the display effect of the display device. 
     Exemplarily, the at least two fifth sub-pixels  220  may have a same emission color. 
     Exemplarily, the at least two fifth sub-pixels  220  may also have different emission colors. 
     In an embodiment, the first sub-pixel group  100  may include two second sub-pixels  120  of different emission colors, the second sub-pixel group  200  may include two fifth sub-pixels  220  of different emission colors, and the pixel unit  10  may include sub-pixels of four colors. 
     Exemplarily, the four colors may be selected from red, green, blue and any one of white or yellow. 
     Colors of the first sub-pixel  110 , each second sub-pixel  120 , the fourth sub-pixel  210 , and each fifth sub-pixel  220  are not limited by this embodiment and any solution satisfying the above color arrangement is within the protection scope of this embodiment. 
     In an embodiment, referring to  FIG. 24 , two adjacent pixel units  10  constitute a pixel unit group  1  in a direction Y vertical to the first direction X, and the two pixel units  10  in the same pixel unit group  1  have a same structure. 
       FIG. 25  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 25  is similar to the pixel structure shown in  FIG. 24  except that arrangement orders of a first sub-pixel group  100  and a second sub-pixel group  200  in two pixel units  10  in a same pixel unit group  1  in a first direction X are different. 
     In this embodiment, the pixel unit group  1  is a minimum repeating unit in the pixel structure, and multiple pixel unit groups  1  are repeatedly arranged to constitute the pixel structure. 
     In an embodiment, as shown in  FIG. 25 , the arrangement orders being different refers to that the first sub-pixel group  100  and the second sub-pixel group  200  in one pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X, and the second sub-pixel group  200  and the first sub-pixel group  100  in another pixel unit  10  in the pixel unit group  1  are sequentially arranged in the first direction X. That is, the first sub-pixel groups  100  in the two pixel units  10  in the same pixel unit group  1  have an identical structure, the second sub-pixel groups  200  in the two pixel units  10  in the same pixel unit group  1  also have an identical structure, and only the arrangement orders of the first sub-pixel group and the second sub-pixel group are different. 
     Such structure shown in  FIG. 25  prevents sub-pixels of a same color from being arranged adjacently in the first direction X or a direction Y vertical to the first direction X, thereby reducing the probability of the occurrence of bright lines and facilitating improving the display effect of the display device. 
       FIG. 26  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 27  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 26  is similar to the pixel structure shown in  FIG. 24 , and the pixel structure shown in  FIG. 27  is similar to the pixel structure shown in  FIG. 25  except that in  FIGS. 26 and 27 , two pixel units  10  in a same pixel unit group  1  are misaligned in a first direction X and a misalignment width d is less than a width of a first sub-pixel group  100 . 
     In this embodiment, the misalignment width d refers to a distance between geometric centers of the two pixel units  10  in the same pixel unit group  1  in the first direction X, and the width of the first sub-pixel group  100  refers to a length of the first sub-pixel group  100  in the first direction X. 
     In this embodiment, such arrangement enables sub-pixels of different emission colors to be more compactly arranged, which facilitates color mixture of light of different colors emitted by multiple sub-pixels and further improves the display effect of the display device. 
     Exemplarily, as shown in  FIGS. 20, 21, 26 and 27 , the misalignment width d may be equal to a half of the width of the first sub-pixel group  100 . 
     Experiments showed that in a case where the misalignment width d is equal to a half of the width of the first sub-pixel group  100 , sub-pixels of four different colors in the pixel unit  10  have the highest compactness and the best color mixing effect, thereby enabling the display device to have a better display effect. 
       FIG. 28  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 29  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 28  is similar to the pixel structure shown in  FIG. 24 , and the pixel structure shown in  FIG. 29  is similar to the pixel structure shown in  FIG. 25  except that in  FIGS. 28 to 29 , second sub-pixels  120  are circular in shape. 
     In this embodiment, such arrangement enables the second sub-pixel  120  to have the same shape as a droplet of the light-emitting functional layer material when the light-emitting functional layer material of the sub-pixel is formed by using an inkjet printing technology, and thus the formed film light-emitting functional layer material has a better uniformity, referring to the preceding related contents for details, which will not be repeated herein. 
       FIG. 30  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 31  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 30  is similar to the pixel structure shown in  FIG. 24 , and the pixel structure shown in  FIG. 31  is similar to the pixel structure shown in  FIG. 25  except that in  FIGS. 30 to 31 , fifth sub-pixels  220  are circular in shape. 
     In this embodiment, such arrangement enables the fifth sub-pixel  220  to have a same shape as a droplet of the light-emitting functional layer material when the light-emitting functional layer material of the sub-pixel is formed by using an inkjet printing technology, and thus the formed film of the light-emitting functional layer material has a better uniformity, referring to the preceding related contents for details, which will not be repeated herein. 
       FIG. 32  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure.  FIG. 33  is a schematic diagram of another pixel structure provided by an embodiment of the present disclosure. The pixel structure shown in  FIG. 32  is similar to the pixel structure shown in  FIG. 24 , and the pixel structure shown in  FIG. 33  is similar to the pixel structure shown in  FIG. 25  except that in  FIGS. 32 to 33 , second sub-pixels  120  and fifth sub-pixels  220  are all circular in shape. 
     In this embodiment, such arrangement enables the second sub-pixel  120  and the fifth sub-pixel  220  to have the same shape as a droplet of the light-emitting functional layer material when the light-emitting functional layer material of the sub-pixel is formed by using an inkjet printing technology, and thus the formed film of the light-emitting functional layer material has a better uniformity, referring to the preceding related contents for details, which will not be repeated herein. 
       FIG. 34  is a structural diagram of a display panel provided by an embodiment of the present disclosure. As shown in  FIG. 34 , the display panel  20  includes the pixel structure  21  described in any embodiment of the present disclosure. Since the display panel provided by the present disclosure includes any pixel structure  21  provided by the embodiments of the present disclosure, the display panel has the same or corresponding beneficial effects as the pixel structure  21  included in the display panel, which will not be repeated herein. 
       FIG. 35  is a sectional view taken along a dotted line CD in  FIG. 34 . As shown in  FIG. 35 , each second sub-pixel  120  includes a first electrode  1211 , a light-emitting functional layer  1221  and a second electrode  1231  laminated sequentially in a light-emitting direction, and at least one second sub-pixel  120  in a same first sub-pixel group  10  shares a same first electrode  1211 . 
     Referring to  FIG. 35 , the display panel includes a base substrate  141 , and a drive circuit layer  142 , a light-emitting device layer  143  and an encapsulation layer (not shown in  FIG. 35 ) which are sequentially formed on the base substrate  141 . The drive circuit layer  142  includes multiple drive circuits. To simplify drawings, in  FIG. 35 , only drive transistors  11  in the drive circuits are illustrated exemplarily, and each drive circuit is configured to drive one sub-pixel to emit light. Moreover, the light-emitting device layer  143  includes multiple sub-pixels and a pixel definition layer  1431  defining the multiple sub-pixels. In an embodiment, as shown in  FIG. 35 , the sub-pixels include a first sub-pixel  110  and a second sub-pixel  120 , the first sub-pixel  110  includes a first A electrode  1212 , a A light-emitting function layer  1222 , and a second A electrode  1232  which are laminated sequentially in a light-emitting direction, the first A electrode  1212  of the first sub-pixel  110  and the first electrode  1211  of the second sub-pixel  120  are located in a same layer, and the A light-emitting function layer  1222  of the first sub-pixel  110  and a light-emitting function layer  1221  of the second sub-pixel  120  are located in a same layer. In  FIG. 35 , the first A electrode  1212  of the first sub-pixel  110  and the first electrode  1211  of the second sub-pixel  120 , and the A light-emitting function layer  1222  of the first sub-pixel  110  and the light-emitting function layer  1221  of the second sub-pixel  120  are distinguished by different filling shadows. In an embodiment, both the first A electrode  1212  and the A light-emitting function layer  1222  of the first sub-pixel  110  are an integral structure, and the first A electrode  1212  and the A light-emitting functional layer  1222  have the same shape as the first sub-pixel  110  shown in  FIG. 34 . 
       FIG. 36  is a structural diagram of a display device provided by an embodiment of the present disclosure. As shown in  FIG. 36 , the display device  30  includes the display panel  20  described in any embodiment of the present disclosure. Since the display device  30  provided in the present disclosure includes any display panel  20  provided by the embodiments of the present disclosure, details are not repeated here.