Patent Publication Number: US-2022216241-A1

Title: Pixel Arrangement Structure, Display Panel and Display Device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/630,414, filed Jan. 24, 2019, which is the United States national phase of International Application No. PCT/CN2019/072983, filed Jan. 24, 2019, the disclosures of which are incorporated by reference herein in their entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the field of display technology, and especially to a pixel arrangement structure, a display panel and a display device. 
     BACKGROUND 
     With the development of electronic products such as mobile phones, full-screen displaying has become a development trend of products. In a full-screen mobile phone, functional elements such as a front camera and an infrared radiation (IR) hole have become important factors restricting an improvement of screen-to-body ratio. In some related arts, under-screen functional elements are provided. 
     SUMMARY 
     After research, the inventor has found that the screens in the related arts are inadequate in the light transmittance, which may affect the optical signal reception of the under-screen functional elements to a certain extent. 
     In view of this, embodiments of the present disclosure provide a pixel arrangement structure, a display panel, and a display device, which can improve the optical signal reception by the under-screen functional elements. 
     In one aspect of the present disclosure, a pixel arrangement structure is provided. The pixel arrangement structure includes: 
     a first pixel area including a plurality of first-category pixel groups, sub-pixels in each first-type pixel group of which is arranged according to a first arrangement manner; and 
     a second pixel area including a plurality of second-category pixel groups, sub-pixels in each second-type pixel group of which is arranged according to a second arrangement manner; 
     wherein the first pixel area is adjacent to the second pixel area, and the first pixel area has a pixel density lower than a pixel density of the second pixel area. 
     In some embodiments, the first arrangement manner is a Real arrangement, and the second arrangement manner is a Pentile arrangement. 
     In some embodiments, the pixel density of the first pixel area is 1/N of the pixel density of the second pixel area, where N is an integer greater than 1. 
     In some embodiments, each of the first-category pixel groups includes a first sub-pixel of a first color, a second sub-pixel of a second color, and a third sub-pixel of a third color, wherein lines connecting centers of the first sub-pixel, the second sub-pixel, and the third sub-pixel form a triangle, the plurality of repeated first-category pixel groups are arranged in an array, and in the first pixel area, centers of first sub-pixels of each column of the first-category pixel groups are in a same straight line, centers of the first sub-pixels of each row of the first-category pixel groups are in a same straight line, and centers of second sub-pixels and third sub-pixels of each row of the first-category pixel groups are all in a same straight line. 
     In some embodiments, centers of the second sub-pixels of each column of the first-category pixel groups are in a same straight line, and centers of the third sub-pixels of each column of the first-category pixel groups are in a same straight line in the first pixel area. 
     In some embodiments, positions of the second sub-pixels and the third sub-pixels respectively with respect to the first sub-pixels in odd-numbered rows of the first-category pixel groups of each column of the first-category pixel groups in the first pixel area are opposite to positions of the second sub-pixels and the third sub-pixels respectively with respect to the first sub-pixels in even-numbered rows. 
     In some embodiments, each of the second-category pixel groups includes a fourth sub-pixel of the first color, a fifth sub-pixel of the second color, a sixth sub-pixel of the third color, and a seventh sub-pixel of the first color, and the second-category pixel groups are divided into a group of first pixels and a group of second pixels according to an arrangement manner of sub-pixels, the plurality of second-category pixel groups are arranged in an array, and the first pixels and the second pixels are both repeatedly arranged along a row direction, and arranged alternatively along a column direction; 
     the centers of the first sub-pixels of each column of the first-category pixel groups in the first pixel area, and centers of seventh sub-pixels of the first pixels and fourth sub-pixels of the second pixels in the second pixel area are in a same straight line. 
     In some embodiments, centers of the second sub-pixels of each column of the first-category pixel groups of at least partial rows in the first pixel area, and centers of fifth sub-pixels of a corresponding column of the second-category pixel groups in the second pixel area are in a same straight line. 
     In some embodiments, a plurality of eighth sub-pixels of the first color are provided at positions in the second pixel area adjacent to the first pixel area, wherein the eighth sub-pixel is located between the second sub-pixel in one of every two adjacent columns of the first-category sub-pixels in the first pixel area and the third sub-pixel in another of every two adjacent columns of the first-category sub-pixels in the first pixel area. 
     In some embodiments, the second sub-pixel, the third sub-pixel, the fifth sub-pixel, and the sixth sub-pixel all have a same shape, shapes of the first sub-pixel, the fourth sub-pixel and the seventh sub-pixel are all same or all different. 
     In some embodiments, each of sub-pixels in the first-category pixel group has a shape of a quadrilateral or a hexagon, and each of sub-pixels in the second-category pixel group has a shape of a quadrilateral, a pentagon or a hexagon. 
     In some embodiments, sub-pixels adjacent to each other in the first pixel area and the second pixel area have different colors. 
     In some embodiments, the first color is green, the second color is red, and the third color is blue. 
     In some embodiments, the fourth sub-pixel and the seventh sub-pixel have an equal area, the fifth sub-pixel and the sixth sub-pixel have an equal area, and the fourth sub-pixel has an area smaller than or equal to that of the fifth sub-pixel. 
     In one aspect of the present disclosure, a pixel display panel is provided. The display panel includes the foregoing pixel arrangement structure. 
     In one aspect of the present disclosure, a display device is provided. The display device includes: 
     the foregoing display panel; and 
     a functional element located on an opposite side of a light emitting side of the display panel, wherein a projection of a light receiving surface of the functional element on the display panel is located in the first pixel area, to receive an incident light from the light emitting side of the display panel. 
     In some embodiments, the functional element includes at least one of a camera, an IR element, a reflective induction element, and an ambient light sensor. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which constitute part of this specification, illustrate exemplary embodiments of the present disclosure, and together with this specification, serve to explain the principles of the present disclosure. 
       The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: 
         FIG. 1  is a schematic structural view according to one embodiment of a display device of the present disclosure; 
         FIG. 2  is a schematic pixel arranging diagram according to one embodiment of the pixel arrangement structure of the present disclosure; 
         FIGS. 3 and 4  are respectively schematic pixel arranging diagrams of pixel groups in odd-numbered rows and even-numbered rows in the second display area according to one embodiment of the pixel arrangement structure of the present disclosure; 
         FIGS. 5-8  are respectively schematic pixel arranging diagrams according to some embodiments of the pixel arrangement structure of the present disclosure; 
         FIG. 9  is a schematic pixel arranging diagram according to another embodiment of the pixel arrangement structure of the present disclosure; 
         FIGS. 10 and 11  are respectively schematic pixel arranging diagrams of pixel groups in odd-numbered rows and even-numbered rows in the second display area according to another embodiment of the pixel arrangement structure of the present disclosure; 
         FIGS. 12 to 15  are respectively schematic pixel arranging diagrams according to other embodiments of the pixel arrangement structure of the present disclosure; 
         FIGS. 16-20  are respectively schematic pixel arranging diagrams according to further embodiments of the pixel arrangement structure of the present disclosure. 
     
    
    
     It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn according to the actual scale. In addition, the same or similar reference signs are used to denote the same or similar components. 
     DETAILED DESCRIPTION 
     Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended as a limitation to the present disclosure, its application or use. The present disclosure may be implemented in many different forms, which are not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art. It should be noticed that: relative arrangement of components and steps, material composition, numerical expressions, and numerical values set forth in these embodiments, unless specifically stated otherwise, should be explained as merely illustrative, and not as a limitation. 
     The use of the terms “first”, “second” and similar words in the present disclosure do not denote any order, quantity or importance, but are merely used to distinguish between different parts. A word such as “comprise”, “include” or variants thereof means that the element before the word covers the element(s) listed after the word without excluding the possibility of also covering other elements. The terms “up”, “down”, “left”, “right”, or the like are used only to represent a relative positional relationship, and the relative positional relationship may be changed correspondingly if the absolute position of the described object changes. 
     In the present disclosure, when it is described that a particular device is located between the first device and the second device, there may be an intermediate device between the particular device and the first device or the second device, and alternatively, there may be no intermediate device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to said other devices without an intermediate device, and alternatively, may not be directly connected to said other devices but with an intermediate device. 
     All the terms (including technical and scientific terms) used in the present disclosure have the same meanings as understood by those skilled in the art of the present disclosure unless otherwise defined. It should also be understood that terms as defined in general dictionaries, unless explicitly defined herein, should be interpreted as having meanings that are consistent with their meanings in the context of the relevant art, and not to be interpreted in an idealized or extremely formalized sense. 
     Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, these techniques, methods, and apparatuses should be considered as part of this specification. 
     In some related arts, functional elements such as the front camera and IR hole are provided under the screen of a full-screen mobile phone. After research, the inventor has found that the screens in the related arts are inadequate in the light transmittance, which may affect the optical signal reception of the under-screen functional elements to a certain extent. 
     In view of this, embodiments of the present disclosure provide a pixel arrangement structure, a display panel, and a display device, which can improve the optical signal reception of the under-screen functional elements. 
       FIG. 1  is a schematic structural view according to one embodiment of a display device of the present disclosure. 
     Referring to  FIG. 1 , in some embodiments, the display device includes a display panel  3  and a functional element  4 . The display panel  3  includes a specific pixel arrangement structure including a first pixel area L and a second pixel area H adjacent to each other. The first pixel area L and the second pixel area H adjacent to each other means that the distance between the edge of the first pixel area L adjacent to the second pixel area H and the second pixel area H is smaller than the height of the sub-pixel in the first pixel area L along a column direction. In  FIG. 1 , a major part of the display panel  3  is a second pixel area H, and the first pixel area L is located at an upper edge of the second pixel area H. 
     The functional element  4  can be located on an opposite side of the light emitting side of the display panel  3 , and the light receiving surface of the functional element  4  corresponds to the first pixel area L in the pixel arrangement structure of the display panel  3 , and is configured to receive an incident light from the light emitting side of the display panel  3 . 
     The functional element  4  can include a camera element, such as a front camera of a mobile phone. The functional element can also include an IR element, a reflective induction element, or an ambient light sensor. The first pixel area L and the second pixel area H can display an image, and the functional element can also receive the incident light from the outside of the display panel through the first pixel area of the display panel  3 . 
     In order to increase the light transmittance of the first pixel area L, the first pixel area L can be made to have a pixel density lower than a pixel density of the second pixel area H. Therefore, according to embodiments of the present disclosure, the first pixel area and the second pixel area adjacent to each other respectively include pixel groups in different arrangement manners, and the first pixel area has a pixel density lower than that of the second pixel area. In this way, on one hand, it is possible to reduce the light emitting area of the first pixel area, and increase the light transmittance, so that the functional element receives more light signals; on the other hand, it is also possible to simplify the design of the backplane circuit of the first pixel area. 
       FIG. 2  is a schematic pixel arranging diagram according to one embodiment of the pixel arrangement structure of the present disclosure. 
     Referring to  FIG. 2 , in some embodiments, the first pixel area L includes a plurality of first-category pixel groups  10 . Sub-pixels in each first-type pixel group of the first-category pixel groups  10  is arranged according to a first arrangement manner. The first arrangement manner can be a Real arrangement (i.e., Real RGB). This arrangement manner can include red (R) sub-pixels, green (G) sub-pixels, and blue (B) sub-pixels arranged in several arrays, and the sub-pixels having three different colors are crossed therebetween, to present a shape which is approximately a “delta shape”. The second pixel area H includes a plurality of second-category pixel groups. Sub-pixels in each second-type pixel group of the second-category pixel groups is arranged according to a second arrangement manner. The second arrangement manner is alternatively a Pentile arrangement, that is, a sub-pixel is added on the basis of RGB to realize, for example, red, green, blue and green (RGBG), red, green, blue and white (RGBW), red, green, blue and yellow (RGBY), or the like. Moreover, partial sub-pixels in the Pentile arrangement are “shared”, thereby achieving a higher resolution than an actual resolution in a visual effect. 
     The first-category pixel groups  10  which uses a Real arrangement, can minimize a visual effect loss of the first pixel area L. Since the first pixel area L has a pixel density lower than that of the second pixel area H, compared to the use of a virtual resolution, the first pixel area L having the pixel group which uses a real resolution can improve a visual experience of human eye. In addition, the number of sub-pixels having R and B colors in the Real arrangement manner is twice that of the Pentile arrangement manner. Therefore, at the same aperture ratio (i.e., the same brightness), each sub-pixel of the pixel group in a Real arrangement has a brightness half of that of each sub-pixel of the pixel group in a Pentile arrangement, and correspondingly has a required sub-pixel current also half of that in a Pentile arrangement, thereby reducing a service life attenuation rate of the sub-pixel. 
     In  FIG. 2 , the first pixel area L is adjacent to the second pixel area H. The number of sub-pixels in the first pixel area L based on a Real arrangement along a row direction and a column direction is reduced by ½ compared to the number of sub-pixels in the second pixel area H based on a Pentile arrangement, so that the pixel density of the first pixel area L can be ½ of the pixel density of the second pixel area H. In other embodiments, the ratio of the pixel density of the first pixel area L to that of the second pixel area H can be 1/N, wherein N is an integer greater than 1. Here, the pixel density of the first pixel area L is a density of actual pixels. Actual pixel refers to a physical pixel, that is, the smallest physical unit capable of controlling display of the display panel. The pixel density of the second pixel area H is a density of virtual pixels. Virtual pixel also refers to as an intuition pixel, whose color is obtained by mixing a plurality of adjacent color pixels. The bright spots formed by the virtual pixel are scattered and located between various actual sub-pixels. 
     Referring to  FIG. 2 , in some embodiments, the first-category pixel group  10  include a first sub-pixel  11  of a first color, a second sub-pixel  12  of a second color, and a third sub-pixel  13  of a third color (different colors are distinguished by different filling patterns in the drawings). Lines connecting centers of the first sub-pixel  11 , the second sub-pixel  12 , and the third sub-pixel  13  can form a triangle. In  FIG. 2 , the first sub-pixel  11  in the first-category pixel group  10  is located on one side of the second sub-pixel  12  and the third sub-pixel  13  away from the second pixel area H (i.e., an upper side of the second sub-pixel  12  and the third sub-pixel  13  in  FIG. 2 ). 
     In some embodiments, the first color is green, the second color is red, and the third color is blue to form the three primary colors of RGB. In other embodiments, the first color is green, the second color is blue, and the third color is red. In other embodiments, the three colors can also be other colors, such as cyan, magenta, and yellow, to form the three primary colors of CMY. 
     A plurality of first-category pixel groups  10  are arranged in an array. The centers of the first sub-pixels  11  of each column of the first-category pixel groups in the first pixel area L are in a same straight line. For an embodiment in which the first color is green, human eye is more sensitive to green sub-pixels. Therefore, when the green sub-pixels are linearly aligned along a column direction, the pixel arrangement within the first pixel area L can be more uniform visually. In addition, the centers of the first sub-pixels  11  of each row of the first-category pixel groups  10  can also be in a same straight line, and the centers of the second sub-pixels and the third sub-pixels of each row of the first-category pixel groups  10  can be all in the same straight line. By aligning the first sub-pixels along a row direction in a straight line, with the second sub-pixels and the third sub-pixels also aligned in a straight line, the white point distribution formed by the first-category pixel groups  10  can be more uniform, thereby improving the display quality. 
     In  FIG. 2 , in each column of the first-category pixel groups  10  in the first pixel area L, the centers of the second sub-pixels  12  are in the same straight line, and the centers of the third sub-pixels  13  are in the same straight line. In this way, the second color and the third color within the first pixel area L can form a vertical line with a favorable consistency along a column direction, and the first sub-pixels of the first color that also line up in the column direction, thereby making the pixel arrangement of the first pixel area L along a column direction and a row direction more uniform visually, and further improving the display quality. 
     Referring to  FIG. 2 , in some embodiments, the second-category pixel groups  20  include a fourth sub-pixel  21  of the first color, a fifth sub-pixel  22  of the second color, a sixth sub-pixel  23  of the third color, and a seventh sub-pixel  24  of the first color. Here, the first color, the second color, and the third color can refer to the colors of the sub-pixels in the first pixel area L. For example, the first color is green, the second color is red, and the third color is blue. 
       FIGS. 3 and 4  are respectively schematic pixel arranging diagrams of pixel groups in odd-numbered rows and even-numbered rows in a second display area according to one embodiment of the pixel arrangement structure of the present disclosure. 
     Referring to  FIGS. 3 and 4 , the second-category pixel groups  20  in the embodiment of  FIG. 2  can be divided into a group of first pixels  20   a  and a group of second pixels  20   b  according to an arrangement manner of the sub-pixels. The plurality of second-category pixel groups  20  can be arranged in an array. The first pixels  20   a  and the second pixels  20   b  are both repeated along a row direction and arranged alternatively along a column direction. 
     In  FIG. 3 , the fourth sub-pixel  21  of the first pixel group  20   a  is located on a left side of the sixth sub-pixel  23 , the fifth sub-pixel  22  is located on a right side of the sixth sub-pixel  23 , and the seventh sub-pixel  24  is located between the fifth sub-pixel  22  and the sixth sub-pixel  23  and on a lower side of the fifth sub-pixel  22  and the sixth sub-pixel  23 . In  FIG. 4 , the seventh sub-pixel  24  of the second pixel  20   b  is located on a lower left side of the fifth sub-pixel  22 , the fourth sub-pixel  21  is located on a right side of the fifth sub-pixel  22 , and the sixth sub-pixel  23  is located on a right side of the fourth sub-pixel  21 . In the first pixels  20   a  and the second pixels  20   b , the fourth sub-pixel  21  and the seventh sub-pixel  24  are both in the first color. 
     Referring to  FIG. 2 , in some embodiments, the centers of the first sub-pixels  11  of each column of the first-category pixel groups  10  in the first pixel area L and the center of one of the fourth sub-pixel  21  and the seventh sub-pixel  24  of each column of the second-category pixel groups  20  in the second pixel area H are in a same straight line. For an embodiment in which the first color is green, human eye is more sensitive to green sub-pixels. Therefore, when the green sub-pixels are linearly aligned along a column direction of the first pixel area L and the second pixel area H, the white lines within the first pixel area L and the second pixel area H adjacent to each other along a column direction are more matched, so that the first pixel area L and the second pixel area H have a relatively smaller image change and offset, thereby enhancing the image quality. 
       FIGS. 5-8  are respectively schematic pixel arranging diagrams according to some embodiments of the pixel arrangement structure of the present disclosure. 
     Referring to  FIGS. 2 and 5 , by comparing the embodiment of  FIG. 5  and the embodiment of  FIG. 2 , the difference lies in that the first sub-pixel  11  in the first-category pixel groups  10  in the first pixel area L is located on one side of the second sub-pixel  12  and the third sub-pixel  13  adjacent to the second pixel area H (i.e., lower sides of the second sub-pixel  12  and the third sub-pixel  13  in  FIG. 5 ). This makes the sub-pixels of the first pixel area L adjacent to the second pixel area H to be the second sub-pixel  12  and the third sub-pixel  13 , and the sub-pixel of the second pixel area H adjacent to the first pixel area L to be the first sub-pixel  11 , so that the sub-pixels of the first pixel area L and the second pixel area H adjacent to each other have different colors, thereby reducing or eliminating the color shift risk caused by color accumulation of the second sub-pixel and the third sub-pixel at a boundary position of the two pixel positions, and enhancing the image quality. 
     Referring to  FIGS. 2 and 6 , by comparing the embodiment of  FIG. 6  and the embodiment of  FIG. 2 , the difference lies in that the first-category pixel groups in odd-numbered and even-numbered rows in the first pixel area L have different arrangement manners. In  FIG. 6 , positions of the second sub-pixel  12  and the third sub-pixel  13  in the first-category pixel groups  10   a  in the odd-numbered rows with respect to the first sub-pixel  11  are different from the positions of the second sub-pixel  12  and the third sub-pixel  13  in the first-category pixel groups  10   b  in the even-numbered rows with respect to the first sub-pixel  11 . The first-category pixel groups  10   a  in the odd-numbered rows and the first-category pixel groups  10   b  in the even-numbered rows are arranged at intervals along a column direction. This pixel structure can make the first pixel area L form an alternating form of the second sub-pixel  12  of the second color and the third sub-pixel of the third color along a column direction, which can reduce the color shift risk accumulated in a single color, thereby enhancing the image quality. 
     In addition, referring to  FIG. 6 , in some embodiments, the centers of the second sub-pixels  12  of each column of the first-category pixel groups  10   a  or  10   b  in at least partial rows in the first pixel area L and the fifth sub-pixels  22  in a corresponding column of the second-category pixel groups  20  in the second pixel area H are in the same straight line. In this way, the first pixel area L and the second pixel area H can form lines of a second color with relatively consistent shapes. Similarly, the centers of the third sub-pixels  13  of each column of the first-category pixel groups  10   a  or  10   b  in at least partial rows in the first pixel area L and the sixth sub-pixels  23  in a corresponding column of the second-category pixel groups  20  in the second pixel area H are in the same straight line. In this way, the first pixel area L and the second pixel area H can have a relatively smaller image change and offset, thereby improving the image quality. 
     In  FIG. 6 , the sub-pixels of the first pixel area L and the second pixel area H adjacent to each other have different colors, so that it is possible to effectively reduce or eliminate the color shift risk caused by accumulation of the sub-pixels having the same color at a boundary position of the two pixel positions, and enhancing the image quality. 
     Referring to  FIGS. 5 and 7 , by comparing the embodiment of  FIG. 7  and the embodiment of  FIG. 5 , the difference lies in that the first-category pixel groups in odd-numbered and even-numbered rows in the first pixel area L have different arrangement manners. In  FIG. 7 , the positions of the second sub-pixel  12  and the third sub-pixel  13  in the first-category pixel groups  10   a  in the odd-numbered rows relative to the first sub-pixel  11  are opposite to the positions of the second sub-pixel  12  and the third sub-pixel  13  in the first-category pixel groups  10   b  in the even-numbered rows relative to the first sub-pixel  11 . The first-category pixel groups  10   a  in the odd-numbered rows and the first-category pixel groups  10   b  in the even-numbered rows are arranged at intervals along a column direction. This pixel structure can make the first pixel area L form an alternating form of the second sub-pixel  12  of the second color and the third sub-pixel of the third color along a column direction, which can reduce the color shift risk of single color accumulation, thereby enhancing the image quality. 
     In addition, referring to  FIG. 7 , in some embodiments, the centers of the second sub-pixels  12  of each column of the first-category pixel groups  10   a  or  10   b  in at least partial rows in the first pixel area L and the centers of the fifth sub-pixels  22  of the second-category pixel groups  20  in a corresponding column in the second pixel area H are in the same straight line. In this way, the first pixel area L and the second pixel area H can form lines of a second color with relatively consistent shapes. Similarly, the centers of the third sub-pixels  13  of each column of the first-category pixel groups  10   a  or  10   b  in at least partial rows in the first pixel area L and the center of the sixth sub-pixels  23  of the second-category pixel groups  20  in a corresponding column in the second pixel area H are in the same straight line. In this way, the first pixel area L and the second pixel area H can have a relatively smaller image change and offset, thereby improving the image quality. 
     In  FIG. 7 , the sub-pixels of the first pixel area L and the second pixel area H adjacent to each other have different colors, so that it is possible to effectively reduce or eliminate the color shift risk caused by accumulation of the sub-pixels having the same color at a boundary position of the two pixel areas, and enhancing the image quality. 
     Compared with the above-described embodiments, referring to  FIG. 8 , in some embodiments, a plurality of eighth sub-pixels  25  of the first color in the second pixel area can be provided adjacent to the first pixel area L. The eighth sub-pixel  25  is located between the second sub-pixel in one of every two adjacent columns of the first-category sub-pixels in the first pixel area and the third sub-pixel in another of every two adjacent columns of the first-category sub-pixels in the first pixel area. In  FIG. 8 , at a location where the first pixel area L is adjoined with the second pixel area H, the sub-pixels of the second color and the sub-pixels of the third color are present alternately, and the sub-pixels of the second color and the sub-pixels of the third color are mixed by adding the eighth sub-pixel  25 , so that it is possible to eliminate a purple color bleeding risk at the adjoining location, thereby enhancing the image quality. 
     The eighth sub-pixel  25  can also be added to other embodiments. For example, in the embodiments of  FIGS. 2 and 6 , the eighth sub-pixel  25  can be disposed at a position in the second pixel area H adjacent to the first pixel area L, and between the second sub-pixel and the third sub-pixel between every two adjacent columns of the first-category sub-pixels in the first pixel area. 
     Referring to  FIGS. 2 to 8 , in some embodiments, the second sub-pixel  12 , the third sub-pixel  13 , the fifth sub-pixel  22 , and the sixth sub-pixel  23  all have a same shape, which is hexagonal. The first sub-pixel  11  is a hexagon, which has the same shape as that of the second sub-pixel  12  and the third sub-pixel  13 , but the shape of the first sub-pixel  11  is different from that of the fourth sub-pixel  21  or the seventh sub-pixel  24 . The shapes of the fourth sub-pixel  21  and the seventh sub-pixel  24  are pentagons with opposite directions respectively, and having an equal area. The fifth sub-pixel  22  and the sixth sub-pixel  23  have an equal area, and the fourth sub-pixel  21  has an area smaller than that of the fifth sub-pixel  22 . 
     In above-described various embodiments of each pixel arrangement structure of the present disclosure, the shapes and arrangement manners of the sub-pixels in each pixel group are not limited to those shown in  FIGS. 2 to 8 , and other shapes and arrangement manners can also be used. 
       FIG. 9  is a schematic pixel arranging diagram according to another embodiment of the pixel arrangement structure of the present disclosure. 
     Referring to  FIG. 9 , in some embodiments, the first-category pixel groups  10 ′ include a first sub-pixel  11 ′ of a first color, a second sub-pixel  12 ′ of a second color, and a third sub-pixel  13 ′ of a third color (different colors are distinguished by different filling patterns in the drawings). The lines connecting centers of the first sub-pixel  11 ′, the second sub-pixel  12 ′, and the third sub-pixel  13 ′ can form a triangle. In  FIG. 9 , the first sub-pixel  11 ′ in the first-category pixel groups  10 ′ is located on one side of the second sub-pixel  12 ′ and the third sub-pixel  13 ′ away from the second pixel area H (i.e., an upper side of the second sub-pixel  12 ′ and the third sub-pixel  13 ′ in  FIG. 9 ). 
     In some embodiments, the first color is green, the second color is red, and the third color is blue to form the three primary colors of RGB. In other embodiments, the first color is green, the second color is blue, and the third color is red. In other embodiments, the three colors can also be other colors, such as cyan, magenta, and yellow, to form the three primary colors of CMY. 
     In  FIG. 9 , in some embodiments, the second-category pixel groups  20 ′ include a fourth sub-pixel  21 ′ of the first color, a fifth sub-pixel  22 ′ of the second color, a sixth sub-pixel  23 ′ of the third color, and a seventh sub-pixel  24 ′ of the first color. In the present embodiment, each of the sub-pixels in the first-category pixel groups  10 ′ and the second-category pixel groups  20 ′ has a same shape, which is square, and presents  450  in a row direction and a column direction. 
       FIGS. 10 and 11  are respectively schematic pixel arranging diagrams of pixel groups in odd-numbered rows and even-numbered rows in a second display area according to another embodiment of the pixel arrangement structure of the present disclosure. 
     Referring to  FIGS. 10 and 11 , the second-category pixel groups  20 ′ in the embodiment of  FIG. 9  can be divided into a first pixels  20   a ′ and a second pixels  20   b ′ according to an arrangement manner of the sub-pixels. The plurality of repeated second-category pixel groups  20 ′ can be arranged in an array. The first pixels  20   a ′ and the second pixels  20   b ′ are both repeatedly arranged along a row direction, and arranged alternatively along a column direction. 
     In  FIG. 10 , the seventh sub-pixel  24 ′ of the first pixel  20   a ′ is located on a lower side of the fifth sub-pixel  22 ′ and the sixth sub-pixel  23 ′ and between the fifth sub-pixel  22 ′ and the sixth sub-pixel  23 ′, the fifth sub-pixel  22 ′ is located on a left side of the sixth sub-pixel  23 ′, and the fourth sub-pixel  21 ′ is located on a lower right side of the sixth sub-pixel  23 ′. In  FIG. 11 , the fourth sub-pixel  21 ′ of the first pixel  20   a ′ is located on a lower side of the fifth sub-pixel  22 ′ and the sixth sub-pixel  23 ′ and between the fifth sub-pixel  22 ′ and the sixth sub-pixel  23 ′, the fifth sub-pixel  22 ′ is located on a right side of the sixth sub-pixel  23 ′, and the seventh sub-pixel  24 ′ is located on a lower right side of the fifth sub-pixel  22 ′. In the first pixel  20   a ′ and the second pixel  20   b ′, the fourth sub-pixel  21 ′ and the seventh sub-pixel  24 ′ are both in the first color. 
       FIGS. 12 to 15  are respectively schematic pixel arranging diagrams according to other embodiments of the pixel arrangement structure of the present disclosure. 
     Referring to  FIGS. 9, 12-15 , in some embodiments, a plurality of repeated first-category pixel groups  10 ′ are arranged in an array. The centers of the first sub-pixels  11 ′ of each column of the first-category pixel groups  10 ′ in the first pixel area L are in the same straight line. For an embodiment in which the first color is green, human eye is more sensitive to green sub-pixels. Therefore, when the green sub-pixels are linearly aligned along a column direction, the pixel arrangement within the first pixel area L can be more uniform visually. In addition, the centers of the first sub-pixels  11 ′ of each row of the first-category pixel groups  10 ′ can also be in a same straight line, and the centers of the second sub-pixels  12 ′ and the third sub-pixels  13 ′ can be both in a same straight line. By aligning the first sub-pixels  11 ′ in a row direction, and aligning the second sub-pixels  12 ′ and the third sub-pixels  13 ′ in a straight line, the white point distribution formed by the first-category pixel groups  10 ′ can be more uniform, thereby improving the display quality. 
     In  FIGS. 9 and 12 , the centers of the second sub-pixels  12 ′ of each column of the first-category pixel groups  10 ′ in the first pixel area L are in a same straight line, and the centers of the third sub-pixels  13 ′ are in a same straight line. In this way, the second color and the third color within the first pixel area L can form a vertical line with a favorable consistency along a column direction, cooperating with that the first sub-pixels  11 ′ of the first color are also aligned in the column direction, thereby making the pixel arrangement of the first pixel area L along a column direction and a row direction more uniform visually, and further improving the display quality. 
     In  FIGS. 9, 12-15 , the centers of the first sub-pixel  11 ′ of each column of the first-category pixel groups  10 ′ in the first pixel area L and one of the fourth sub-pixel  21 ′ and the seventh sub-pixel  24 ′ of each column of the second-category pixel groups  20 ′ in the second pixel area H are in the same straight line. For an embodiment in which the first color is green, human eye is more sensitive to green sub-pixels. Therefore, when the green sub-pixels of the first pixel area L and the second pixel area H are linearly aligned along a column direction, the white lines within the first pixel area L and the second pixel area H adjacent to each other along a column direction are more matched, so that the first pixel area L and the second pixel area H have a relatively smaller image change and offset, thereby enhancing the image quality. 
     Referring to  FIGS. 9 and 13 , in some embodiments, the sub-pixels of the first pixel area L adjacent to the second pixel area H are the second sub-pixel  12 ′ and the third sub-pixel  13 ′, and the sub-pixels of the second pixel area H adjacent to the first pixel area L are the third sub-pixel  13 ′ and the second sub-pixel  12 ′, so that the sub-pixels of the first pixel area L and the second pixel area H adjacent to each other have different colors, thereby reducing or eliminating the color shift risk caused by color accumulation at a boundary position of the two pixel areas, and enhancing the image quality. 
     Compared with the embodiments of  FIGS. 9 and 13 , the first sub-pixel  11 ′ of the first-category pixel groups  10 ′ in the first pixel area L in the embodiments of  FIGS. 12 and 14  is located on one side of the second sub-pixel  12 ′ and the third sub-pixel  13 ′ adjacent to the second pixel area H (i.e., a lower side of the second sub-pixel  12  and the third sub-pixel  13  in  FIG. 12 ). This makes the sub-pixel of the first pixel area L adjacent to the second pixel area H to be the first sub-pixel  11 ′, and the sub-pixels of the second pixel area H adjacent to the first pixel area L to be the second sub-pixel  12 ′ and the third sub-pixel  13 ′, so that the sub-pixels of the first pixel area L and the second pixel area H adjacent to each other have different colors, thereby reducing or eliminating the color shift risk caused by color accumulation at a boundary position of the two pixel areas, and enhancing the image quality, and it is also possible to synthesize a white light to avoid a purple color bleeding, thereby enhancing the image quality. 
     Referring to  FIGS. 9, 12-14 , by comparing the embodiments of  FIGS. 13 and 14  and the embodiments of  FIGS. 9 and 12 , the difference lies in that the first-category pixel groups in odd-numbered and even-numbered rows in the first pixel area L have different arrangement manners. In  FIGS. 13 and 14 , the positions of the second sub-pixel  12 ′ and the third sub-pixel  13 ′ of the first-category pixel groups  10   a ′ in the odd-numbered rows with respect to the first sub-pixel  11 ′ are opposite to the positions of the second sub-pixel  12 ′ and the third sub-pixel  13 ′ of the first-category pixel groups  10   b ′ in the even-numbered rows. The first-category pixel groups  10   a ′ in the odd-numbered rows and the first-category pixel groups  10   b ′ in the even-numbered rows are arranged at intervals along a column direction. This pixel structure can make the first pixel area L form an alternating form of the second sub-pixel  12 ′ of the second color and the third sub-pixel  13 ′ of the third color along a column direction, which can reduce the color shift risk of single color accumulation, thereby enhancing the image quality. 
     In addition, referring to  FIGS. 9, 12-14 , in some embodiments, the centers of the second sub-pixels  12 ′ of each column of the first-category pixel groups  10 ′,  10   a ′ or  10   b ′ in at least partial rows in the first pixel area L and the centers of the fifth sub-pixels  22 ′ of a corresponding column of the second-category pixel groups  20 ′ in the second pixel area H are in a same straight line. In this way, the first pixel area L and the second pixel area H can form lines of a second color with relatively consistent shapes. Similarly, the centers of the third sub-pixels  13 ′ of each column of the first-category pixel groups  10 ′,  10   a ′ or  10   b ′ in at least partial rows in the first pixel area L and the centers of the sixth sub-pixels  23 ′ of a corresponding column of the second-category pixel groups  20 ′ in the second pixel area H are in a same straight line. In this way, the first pixel area L and the second pixel area H can have a relatively smaller image change and offset, thereby improving the image quality. 
     Compared with the above-described embodiments shown in  FIGS. 9, 12-14 , referring to  FIG. 15 , in some embodiments, a plurality of eighth sub-pixels  25 ′ of the first color can be provided at positions in the second pixel area H adjacent to the first pixel area L. The eighth sub-pixel  25  is located between the second sub-pixel  12 ′ in one of every two adjacent columns of the first-category sub-pixel groups  10 ′ in the first pixel area and the third sub-pixel  13 ′ in another of every two adjacent columns of the first-category sub-pixels  10 ′ in the first pixel area. In  FIG. 15 , at a location where the first pixel area L is adjoined with the second pixel area H, the sub-pixels of the second color and the third color are present alternately, and the sub-pixels of the second color and the third color are mixed by adding the eighth sub-pixel  25 ′, so that it is possible to eliminate a purple color bleeding risk at the adjoining position, thereby enhancing the image quality. 
     The eighth sub-pixel  25 ′ can also be added to other embodiments. For example, in the embodiments of  FIGS. 9 and 13 , the eighth sub-pixel  25 ′ can be disposed at a position in the second pixel area H adjacent to the first pixel area L, and between the second sub-pixel  12 ′ and the third sub-pixel  13 ′ between every two adjacent columns of the first-category sub-pixels in the first pixel area. 
     In the above-described embodiments shown in  FIGS. 9-15 , each of the sub-pixels included in the first-category pixel groups  10 ′ and the second-category pixel groups  20 ′ has a same shape, such as square. The fourth sub-pixel  21 ′, the fifth sub-pixel  22 ′, the sixth sub-pixel  23 ′, and the seventh sub-pixel  24 ′ in the second-category pixel groups  20 ′ all have an equal area. 
       FIGS. 16-20  are respectively schematic pixel arranging diagrams according to further embodiments of the pixel arrangement structure of the present disclosure. 
     Compared with the embodiments respectively shown in FIGS.  2 ,  5  to  8 , the embodiments respectively shown in  FIGS. 16 to 20  are consistent in aspects such as the arrangement manners, colors and shapes of the sub-pixels in the first-category pixel groups  10  and the second-category pixel groups  20 , and the difference lies in that the first-category pixel groups  10  in the first pixel area L in the embodiments shown in  FIGS. 16 to 20  are arranged more sparsely, and pixel density of the first pixel area L is ¼ of that of the second pixel area H. 
     In the above-described embodiments of the arrangement structure, the first pixel area L can be in any direction of the second pixel area. For example, the second pixel area H in  FIG. 1  can be on the left side, the right side and the lower side of the first pixel area L. 
     The above-described embodiments of the pixel arrangement structure can be applied to a display panel. Therefore, the present disclosure also provides a display panel including embodiments of any of the above-described pixel arrangement structures. The above-described embodiments of the display panel are also applicable to a display device. Therefore, the present disclosure also provides a display device including any of the foregoing display panels and a functional element. The functional element is located on one side of the display panel, and the projection of the light receiving surface thereof on the display panel is located in the first pixel area, to receive the incident light from the light emitting side of the display panel. The functional element can include at least one of a camera, an IR element, a reflective induction element, and an ambient light sensor. 
     Hereto, various embodiments of the present disclosure have been described in detail. Some details well known in the art are not described to avoid obscuring the concept of the present disclosure. According to the above description, those skilled in the art would fully know how to implement the technical solutions disclosed herein. 
     Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that modifications to the above embodiments and equivalently substitution of part of the technical features can be made without departing from the scope and spirit of the present disclosure. The scope of the disclosure is defined by the following claims.