CN111554723A - Pixel structure and display panel - Google Patents

Abstract

The present disclosure relates to a pixel structure and a display panel, wherein the pixel structure includes: at least one pixel island, the pixel island comprising: the pixel structure comprises a central pixel and a first annular pixel, wherein the first annular pixel is arranged around the outer side of the central pixel and comprises a plurality of first sub-pixels distributed along the circumferential direction and first separation blocks positioned between the adjacent first sub-pixels; the light emitting colors of the central pixel and the first annular pixel are different, and the light emitting colors of the plurality of first sub-pixels are the same. The pixel structure can remarkably increase the number of pixel units in unit area, thereby remarkably improving the resolution of the pixel structure and meeting the requirement of high resolution of the pixel structure.

Description

Pixel structure and display panel

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a pixel structure and a display panel.

Background

Currently, in the field of display technology, in order to save cost and improve production efficiency, an inkjet printing method is commonly used to manufacture display products. However, it is difficult to manufacture a high-definition display product due to the constraint of the inkjet printing technology, and thus the requirement for high resolution of the display product cannot be satisfied. It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcome the above-mentioned deficiencies in the prior art, and to provide a pixel structure and a display panel, which can meet the requirement of high resolution of the pixel structure.

The present disclosure provides a pixel structure, comprising: at least one pixel island, the pixel island comprising:

the pixel structure comprises a central pixel and a first annular pixel, wherein the first annular pixel is arranged around the outer side of the central pixel and comprises a plurality of first sub-pixels distributed along the circumferential direction and first separation blocks positioned between the adjacent first sub-pixels;

the light emitting colors of the central pixel and the first annular pixel are different, and the light emitting colors of the plurality of first sub-pixels are the same.

In an exemplary embodiment of the present disclosure, the center pixel includes a plurality of center sub-pixels independently controlled from each other, the center sub-pixels include center light emitting parts, and the center light emitting parts of the center sub-pixels are connected to each other;

the plurality of first sub-pixels are controlled independently, each first sub-pixel comprises a first light-emitting part, and the first light-emitting parts of the first sub-pixels are disconnected.

In one exemplary embodiment of the present disclosure, the central sub-pixel includes a central anode portion and a central hole injection portion between the central anode portion and the central light emitting portion, the central anode portions of adjacent central sub-pixels are disconnected from each other and a second partition block is disposed to disconnect the central hole injection portions of adjacent central sub-pixels,

the first subpixel further includes a first anode part and a first hole injection part between the first anode part and the first light emitting part,

wherein a sum of a height of the central anode portion and a height of the central hole injection portion is less than or equal to a height of the second partition block; the sum of the height of the first anode portion, the height of the first hole injection portion, and the height of the first light emitting portion is less than or equal to the height of the first partition block.

In an exemplary embodiment of the present disclosure, the second spacer includes a first spacer and a second spacer arranged in this order in a direction from the central anode section to the central light emitting section, and an outline of an orthographic projection of the first spacer on the second spacer is located inside an outline of the second spacer.

In an exemplary embodiment of the present disclosure, the pixel island further includes:

and the second annular pixel is arranged at the outer side of the first annular pixel in a surrounding manner, comprises a plurality of second sub-pixels and third partition blocks positioned between the adjacent second sub-pixels, the light emitting colors of the second sub-pixels are the same, and the light emitting colors of the second sub-pixels are different from those of the central pixel and the first sub-pixels.

In an exemplary embodiment of the present disclosure, a first pixel defining portion is disposed between the center pixel and the first annular pixel, the first pixel defining portion being disposed around an outer side of the center pixel, and a second pixel defining portion is disposed between the first annular pixel and the second annular pixel, the second pixel defining portion being disposed around an outer side of the first annular pixel.

In an exemplary embodiment of the present disclosure, the number of the first sub-pixels is the same as the number of the second sub-pixels, and the plurality of first sub-pixels and the plurality of second sub-pixels correspond one to one.

In an exemplary embodiment of the present disclosure, the center pixel is a green pixel; the first annular pixel is a red pixel; the second ring-shaped pixel is a blue pixel, wherein,

the area of the central pixel is smaller than that of the first annular pixel, and the area of the first annular pixel is smaller than that of the second annular pixel.

In an exemplary embodiment of the present disclosure, the pixel structure includes a plurality of the pixel islands, and adjacent pixel islands are in contact, the pixel islands further including:

a third pixel defining section disposed around an outer side of the second ring-shaped pixel.

In another embodiment of the present disclosure, a display panel is provided, which includes the pixel structure described in any one of the above.

The technical scheme provided by the disclosure can achieve the following beneficial effects:

the pixel structure provided by the present disclosure arranges the first annular pixel around the outside of the central pixel, and divides the first annular pixel into a plurality of first sub-pixels by using the first partition block, so that each first sub-pixel can form a pixel unit with the central pixel. Therefore, the pixel structure can form a plurality of pixel units in a unit area of the pixel island, thereby improving the resolution of a display product having the pixel structure. Moreover, since the light emitting colors of the plurality of first sub-pixels are the same, the plurality of first sub-pixels can be simultaneously manufactured by the same manufacturing process. Meanwhile, the area of the first annular pixel formed by the plurality of first sub-pixels is large enough, so that the first annular pixel can adopt a one-time ink-jet printing process, the production efficiency can be improved, and the manufacturing cost can be saved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic view showing a structure of a pixel unit arranged side by side in the related art;

FIG. 2 is a schematic view showing a structure of a diamond-arranged pixel unit in the related art;

FIG. 3 shows a schematic view of a pixel structure projected on a substrate according to an exemplary embodiment of the present disclosure;

FIG. 4 shows a schematic view of a pixel island projected onto a substrate according to an exemplary embodiment of the present disclosure;

FIG. 5 shows a schematic view of a center pixel projected onto a substrate according to an exemplary embodiment of the present disclosure;

FIG. 6 illustrates a schematic cross-sectional structure in the direction A-A of FIG. 4 according to an exemplary embodiment of the present disclosure;

FIG. 7 illustrates a schematic cross-sectional structure in the direction B-B in FIG. 4, according to an exemplary embodiment of the present disclosure;

FIG. 8 illustrates a schematic cross-sectional structure in the direction A-A of FIG. 4 according to another exemplary embodiment of the present disclosure;

fig. 9 shows a schematic view of a pixel structure projected on a substrate according to another exemplary embodiment of the present disclosure;

fig. 10 shows a schematic view of a pixel structure projected on a substrate according to yet another exemplary embodiment of the present disclosure.

Description of reference numerals:

1. a pixel island; 11. a center pixel; 12. a first ring-shaped pixel; 13. a second ring-shaped pixel; 14. a first pixel defining section; 15. a second pixel defining section; 16. a third pixel defining section; 17. a substrate; 18. a cathode layer; 111. a center sub-pixel; 112. a second spacer block; 121. a first sub-pixel; 122. a first partitioning block; 131. a second sub-pixel; 132. a third partitioning block; 1111. a central anode portion; 1112. a central hole injection portion; 1113. a central light emitting section; 1114. a central hole transport layer; 1121. a first partition; 1122. a second partition part; 1211. a first anode section; 1212. a first hole injection portion; 1213. a first light emitting section; 1214. a first hole transport layer; 1311. a second anode section; 1312. a second hole injection portion; 1313. a second light emitting section; 1314. a third hole transport layer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.

It is noted that references herein to "on … …", "formed on … …" and "disposed on … …" can mean that one layer is formed or disposed directly on another layer or that one layer is formed or disposed indirectly on another layer, i.e., there is another layer between the two layers.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

It should be noted that, although the terms "first", "second", etc. may be used herein to describe various elements, components, elements, regions, layers and/or sections, these elements, components, elements, regions, layers and/or sections should not be limited by these terms. Rather, these terms are used to distinguish one element, component, element, region, layer or section from another.

In the present disclosure, unless otherwise specified, the term "disposed on the same layer" is used to mean that two layers, components, members, elements or portions can be formed by the same patterning process, and the two layers, components, members, elements or portions are generally formed of the same material.

In the related art, a pixel unit in which a side-by-side arrangement and a diamond arrangement are arranged is generally used. As shown in fig. 1, the pixel units arranged side by side are formed by sequentially arranging a red sub-pixel, a green sub-pixel and a blue sub-pixel in sequence; as shown in fig. 2, in the diamond-arranged pixel unit, red sub-pixels and blue sub-pixels are sequentially arranged in a first row, and green sub-pixels are arranged in a second row. However, since the ink drop ejected by the nozzle each time can only form one sub-pixel during ink-jet printing, only one pixel unit can be arranged on the unit area of the pixel units arranged side by side and diamond, which results in low resolution of the pixel structure and can not meet the current requirement for high resolution.

In view of the problems in the related art, the embodiments of the present disclosure provide a pixel structure, as shown in fig. 3 and 4, which may include a substrate 17 and at least one pixel island 1 formed on the substrate 17, wherein the substrate 17 may be a driving substrate, which may have a plurality of thin film transistors, but is not limited thereto, and the substrate 17 may not be the driving substrate. The pixel island 1 may include: a central pixel 11 and a first ring-shaped pixel 12, wherein the first ring-shaped pixel 12 may be disposed around the outside of the central pixel 11, and the light emitting colors of the central pixel 11 and the first ring-shaped pixel 12 may be different.

Further, the first annular pixel 12 may include a plurality of first sub-pixels 121 distributed along the circumferential direction and a first partition block 122 located between adjacent first sub-pixels 121, wherein the light emitting colors of the plurality of first sub-pixels 121 are the same. Therefore, the pixel island 1 provided by the present disclosure divides the first ring-shaped pixel 12 into a plurality of first sub-pixels 121 by disposing the first partition block 122, and each of the first sub-pixels 121 and the central pixel 11 may at least partially constitute one pixel unit. Meanwhile, the plurality of first sub-pixels 121 may be formed by one ink-jet process, that is: the pixel island 1 can form a plurality of pixel units by one-time ink-jet technology, so that compared with the pixel units which are arranged side by side and arranged in a diamond mode, the number of the pixel units on a unit area is increased by the pixel island 1, and the resolution of a display product adopting the pixel structure is further improved.

In detail, as shown in fig. 5, the central pixel 11 may include a plurality of central sub-pixels 111 controlled independently from each other, wherein the light emitting colors of the plurality of central sub-pixels 111 may be the same. The center sub-pixels 111 may include center light emitting parts 1113, and the center light emitting parts 1113 of the respective center sub-pixels 111 are connected to each other.

As shown in fig. 5, the plurality of central sub-pixels 111 may be distributed in the circumferential direction in the central pixel 11, or may be arranged in a grid in the central pixel 11, that is: the plurality of central sub-pixels 111 may be arranged in the horizontal direction and the vertical direction, and the arrangement of the plurality of central sub-pixels 111 is not limited in the present disclosure and is within the protection scope of the present disclosure.

Further, the central sub-pixel 111 may include a central anode portion 1111 and a central hole injection portion 1112 located between the central anode portion 1111 and the central light emitting portion 1113, that is: a central hole injection portion 1112 may be formed on the central anode portion 1111 for receiving holes emitted from the central anode portion 1111. The central hole injection portions 1112 of the plurality of central sub-pixels 111 may be disconnected from each other to prevent the central hole injection portions 1112 of the adjacent central sub-pixels 111 from influencing each other, but the disclosure is not limited thereto, and the shape of the central hole injection portions 1112 in the plurality of central sub-pixels 111 is not limited by the disclosure, and may also be connected to each other, which is within the protection scope of the disclosure.

As shown in fig. 6 and 8, the central sub-pixel 111 may further include a second separation block 112 and a central hole transport layer 1114. The central anode portions 1111 may be located on the substrate 17, and the central anode portions 1111 of the adjacent central sub-pixels 111 are disconnected from each other and can be independently controlled, it should be understood that a thin film transistor is disposed below each central anode portion 1111, and the corresponding central anode portion 1111 can be operated by driving different thin film transistors, so as to control the lighting of the corresponding central sub-pixel 111.

The second separating block 112 may be formed on the substrate 17 and located between the adjacent first anode portions 1211 for separating the adjacent central anode portions 1111, so as to prevent the display effect of the pixel structure from being affected by the interference between the adjacent central anode portions 1111. The second divider block 112 may contact the adjacent central anode portion 1111 to better prevent interference between the adjacent central anode portions 1111, but is not limited thereto, and the second divider block 112 may not contact the adjacent central anode portion 1111, which is within the scope of the present disclosure. The height of the second spacer 112 may be 500-1500 angstroms, for example: 500 angstroms, 700 angstroms, 900 angstroms, 1100 angstroms, 1300 angstroms, 1500 angstroms, but is not limited thereto as long as the height of second partition block 112 is greater than or equal to the height of central anode portion 1111.

Further, the second separating block 112 may also be located between the adjacent first hole injection portions 1212 to separate the adjacent central hole injection portions 1112, that is: the sum of the height of the central anode portion 1111 and the height of the central hole injection portion 1112 may be less than or equal to the height of the second spacer 112, so that interference between the adjacent central hole injection portions 1112 can be prevented.

Further, as shown in fig. 8, the second partition block 112 may be "T" shaped, that is: the second partition block 112 may include a first partition 1121 and a second partition 1122, the first partition 1121 and the second partition 1122 may be sequentially disposed in a direction from the central anode portion 1111 to the central light emitting portion 1113, and an outline of a front projection of the first partition 1121 on the second partition 1122 is located inside an outline of the second partition 1122. The first partition 1121 may be located on the substrate 17, and the longitudinal cross-section of the first partition 1121 and the second partition 1122 may be rectangular. By arranging the second separating block 112 in a shape of "T", the distance between the adjacent central hole injection portions 1112 can be larger, so as to ensure that the adjacent central hole injection portions 1112 do not interfere, and at the same time, the central anode portion 1111 can have a larger contact area with the substrate 17, however, the shape of the second separating block 112 is not limited by the present disclosure, for example: the longitudinal section of the second separating block 112 may be a whole rectangle, or may be a trapezoid, etc., all of which are within the protection scope of the present disclosure.

Preferably, the height of the first separating portion 1121 may be the same as that of the central anode portion 1111, and the height of the second separating portion 1122 may be the same as that of the central hole injecting portion 1112, so as to ensure that the central anode portion 1111 and the central hole injecting portion 1112 can both be in close contact with the second separating block 112 during the manufacturing process of the central sub-pixel 111, thereby improving the display effect of the central pixel 11. Meanwhile, since the height of the first partition 1121 is the same as that of the central anode portion 1111 and the height of the second partition 1122 is the same as that of the central hole injection portion 1112, it can be seen that the sum of the heights of the central anode portion 1111 and the central hole injection portion 1112 is the same as that of the second partition 112, so that the upper surface of the central hole injection portion 1112 and the upper surface of the second partition 1122 are on the same horizontal line, and the upper surfaces of the central hole injection portion 1112 and the second partition 1122 are flat, which is more beneficial to the installation of the subsequent central hole transport layer 1114.

In addition, the second separating block 112 may be a black matrix, and it is understood that the material of the second separating block 112 may be photoresist, and the photoresist is patterned by a mask plate to form the second separating block 112.

The central hole transport layer 1114 may be disposed as a whole layer covering each of the central hole injection portions 1112 and the second spacer 112, but is not limited thereto, and may be separated from each other and formed on each of the central hole injection portions 1112 to transport holes injected from the central anode portion 1111 into the central hole injection portions 1112.

The center light-emitting portion 1113 may be disposed on the center hole transport layer 1114, and since the center light-emitting portions 1113 of the plurality of center sub-pixels 111 are connected to each other, the first light-emitting portion 1213 of the plurality of center sub-pixels 111 is disposed on the center hole transport layer 1114 for the entire layer, thereby enabling the different center sub-pixels 111 in the center pixel 11 to be light-supplemented by the surrounding center sub-pixels 111 at the time of lighting so that the luminance at the time of lighting the center sub-pixel 111 is higher.

As shown in fig. 3 and 4, the plurality of first sub-pixels 121 may be independently controlled from each other, and the first sub-pixels 121 may include first light emitting portions 1213, the first light emitting portions 1213 of the respective first sub-pixels 121 being disconnected from each other.

Specifically, the first subpixel 121 may include a substrate 17, and a first anode portion 1211, a first hole injection portion 1212, a first hole transport layer 1214, and a first light emitting portion 1213 sequentially formed on the substrate 17. The first partition blocks 122 may be disposed on the substrate 17, extend in a direction away from the substrate 17, and are located between the adjacent first light emitting portions 1213. Also, the sum of the heights of the first anode portion 1211, the first hole injection portion 1212, the first hole transport layer 1214, and the first light emitting portion 1213 of the first subpixel 121 may be less than or equal to the height of the first partition block 122. Accordingly, the pixel structure provided by the present disclosure separates the first light emitting parts 1213 of the plurality of first sub-pixels 121 by the first separation blocks 122, and may prevent crosstalk between adjacent first sub-pixels 121 from occurring to affect the display effect.

Preferably, the upper surface of the first light emitting portion 1213 may be flush with the upper surface of the first partition block 122, that is: the sum of the heights of the first anode portion 1211, the first hole injection portion 1212, the first hole transport layer 1214, and the first light emitting portion 1213 is the same as the height of the first partition block 122, thereby facilitating the disposition of the subsequent cathode layer 18 so that the cathode layer 18 can be formed on one horizontal plane. The height of the first separating block 122 may be 0.4 to 0.6 μm, for example: 0.4 microns, 0.5 microns, 0.6 microns, but not limited thereto, and the specific height of the first spacer 122 is not limited by the present disclosure and is within the scope of the present disclosure.

In addition, as shown in fig. 7, the longitudinal section of the first separating block 122 may be rectangular, but is not limited thereto, and may also be "T" shaped, trapezoidal, etc., and all fall within the protection scope of the present disclosure. Also, the first separating blocks 122 may be a black matrix, and it is understood that the material of the first separating blocks 122 may be photoresist, and the photoresist is patterned by a mask to form the first separating blocks 122.

As shown in fig. 6, in order to prevent crosstalk between the center pixel 11 and the first ring-shaped pixel 12, a first pixel defining unit 14 may be provided between the center pixel 11 and the first ring-shaped pixel 12, and the first pixel defining unit 14 may be provided around the outer side of the center pixel 11.

Further, the first pixel defining part 14 may be disposed on the substrate 17 and extend in a direction away from the substrate 17, an upper surface of the first pixel defining part 14 may be higher than upper surfaces of the central light emitting part 1113 and the first light emitting part 1213, or flush with the upper surfaces of the central light emitting part 1113 and the first light emitting part 1213, and the first pixel defining part 14 may be in close contact with an outer side of the central pixel 11 and an inner side of the first annular pixel 12, so that the central pixel 11 and the first annular pixel 12 can be better separated, and the display effect of the pixel structure is better.

Preferably, the height of the first pixel defining part 14 may be 1.5 to 2.0 micrometers, for example: 1.5 microns, 1.7 microns, 1.9 microns, 2.0 microns, and may be 10 microns wide. By setting the width of the first pixel defining section 14 to 10 μm, it is possible to ensure that crosstalk does not occur between the center pixel 11 and the first ring-shaped pixel 12, and to ensure that the center pixel 11 and the first ring-shaped pixel 12 have a larger occupation ratio in the entire pixel island 1 to the maximum, thereby ensuring that the pixel structure has a better display effect. However, the height and width of the first pixel defining portion 14 are not limited in this disclosure and are within the scope of the disclosure.

The first pixel defining part 14 may be a black matrix, and a photoresist may be photo-etched through a mask to form the first pixel defining part 14. The longitudinal cross section of the first pixel defining portion 14 may be rectangular, but is not limited thereto, and may also be other shapes, and is within the protection scope of the present disclosure.

Further, the pixel island 1 may further include a second ring-shaped pixel 13, the second ring-shaped pixel 13 may be disposed around the outer side of the first ring-shaped pixel 12, and the second ring-shaped pixel 13 may include a plurality of second sub-pixels 131 and third partition blocks 132 between the adjacent second sub-pixels 131, the light emission colors of the plurality of second sub-pixels 131 may be the same, and the light emission colors of the plurality of second sub-pixels 131 may be different from the light emission colors of the center pixel 11 and the first sub-pixels 121.

In detail, the second subpixel 131 may include a substrate 17, and a second anode portion 1311, a second hole injection portion 1312, a second hole transport layer 1314, and a second light emitting portion 1313 sequentially formed on the substrate 17. The third partition block 132 may be provided on the substrate 17, extend in a direction away from the substrate 17, and be located between the adjacent second light emitting portions 1313. The sum of the heights of the second anode portion 1311, the second hole injection portion 1312, the second hole transport layer 1314 and the second light emitting portion 1313 of the second subpixel 131 may be less than or equal to the height of the third partition block 132. Thus, the pixel structure provided by the present disclosure separates the second light emitting parts 1313 of the plurality of second sub-pixels 131 by the third separating block 132, and can prevent crosstalk between adjacent second sub-pixels 131 from affecting the display effect. Preferably, the upper surface of the second light emitting portion 1313 may be flush with the upper surface of the third partition block 132, that is: the sum of the heights of the second anode portion 1311, the second hole injection portion 1312, the second hole transport layer 1314 and the second light emitting portion 1313 of the second subpixel 131 is the same as the height of the third partition block 132, thereby facilitating the disposition of the subsequent cathode layer 18 so that the cathode layer 18 can be formed on one level.

In addition, as shown in fig. 7, the longitudinal section of the third partition block 132 may be rectangular, but is not limited thereto, and may also be "T" shaped, trapezoidal, and the like, and is within the protection scope of the present disclosure. Also, the third partition blocks 132 may be black matrixes, and it is understood that the first partition blocks 122 may be made of photoresist, and the photoresist is patterned by a mask to form the first partition blocks 122.

Further, the pixel island 1 may further include a second pixel defining part 15, and the second pixel defining part 15 may be disposed between the first and second ring-shaped pixels 12 and 13, and may be disposed around the outside of the first ring-shaped pixel 12.

Further, the second pixel interface part 15 may be disposed on the substrate 17 and extend in a direction away from the substrate 17, and an upper surface of the second pixel interface part 15 may be higher than upper surfaces of the first and second light emitting parts 1213 and 1313 or flush with upper surfaces of the first and second light emitting parts 1213 and 1313. The second pixel defining unit 15 can be in close contact with the outer side of the first annular pixel 12 and the inner side of the second annular pixel 13, so that the first annular pixel 12 and the second annular pixel 13 can be better separated, and crosstalk between the first annular pixel 12 and the second annular pixel 13 can be prevented, thereby improving the display effect of the pixel structure.

Preferably, the height of the second pixel defining part 15 may be 1.5 to 2.0 micrometers, for example: 1.5 microns, 1.7 microns, 1.9 microns, 2.0 microns, the width can be 10 microns, through setting up the width of second pixel boundary portion 15 to 10 microns, can guarantee when can not taking place crosstalk between first annular pixel 12 and second annular pixel 13, furthest guarantees that first annular pixel 12 and second annular pixel 13 have a bigger proportion in whole pixel island 1 to guarantee that the pixel structure has better display effect. However, the height and width of the second pixel defining portion 15 are not limited in the present disclosure, and are within the scope of the present disclosure.

The second pixel defining part 15 may be a black matrix, and a photoresist may be photo-etched through a mask plate, thereby forming the second pixel defining part 15. The longitudinal cross section of the second pixel defining portion 15 may be rectangular, but is not limited thereto, and may also be other shapes, and all of them are within the protection scope of the present disclosure.

Since the first spacer 122, the second spacer 112, the third spacer 132, the first pixel defining portion 14 and the second pixel defining portion 15 are all black matrixes, they can be simultaneously formed on the substrate 17 through one photolithography mask process, and thus the process steps can be simplified. However, in order to save the manufacturing cost, they may be sequentially lithographically formed on the substrate 17. Meanwhile, in order to ensure that the central anode portion 1111, the first anode portion 1211 and the second anode portion 1311 can be formed on the substrate 17 more completely, the central anode portion 1111, the first anode portion 1211 and the second anode portion 1311 may be formed on the substrate 17 by a single patterning process, that is: the central anode portion 1111, the first anode portion 1211 and the second anode portion 1311 may be provided in the same layer, but not limited thereto, and the central anode portion 1111, the first anode portion 1211 and the second anode portion 1311 may be separately manufactured. The first and second spacers 122, 112, 132, the first and second pixel defining parts 14 and 15 are then fabricated by a single patterning process. In addition, it is within the scope of the present disclosure that the first partition block 122, the second partition block 112, the third partition block 132, the first pixel defining portion 14, and the second pixel defining portion 15 may be first fabricated, and then the central anode portion 1111, the first anode portion 1211, and the second anode portion 1311 may be fabricated.

In addition, the central hole injection portion 1112, the first hole injection portion 1212, the second hole injection portion 1312, the central hole transport layer 1114, the first hole transport layer 1214, the second hole transport layer 1314, the central light-emitting portion 1113, the first light-emitting portion 1213, and the second light-emitting portion 1313 described above may be formed by means of inkjet printing. Without limitation, the present disclosure does not limit the formation manner of the central hole injection portion 1112, the first hole injection portion 1212, the second hole injection portion 1312, the central hole transport layer 1114, the first hole transport layer 1214, the second hole transport layer 1314, the central light-emitting portion 1113, the first light-emitting portion 1213, and the second light-emitting portion 1313, for example: it is within the scope of the present disclosure that the formation may be by evaporation.

In addition, each of the central sub-pixels 111 in the central pixel 11 may be formed by one-time inkjet printing, and each of the second sub-pixels 131 in the second ring-shaped pixel 13 may be formed by one-time inkjet printing. Meanwhile, in order to save the manufacturing process, the layers of the center pixel 11, the first annular pixel 12, and the second annular pixel 13 may be simultaneously manufactured, but the present invention is not limited thereto, and may be separately manufactured.

Besides, as shown in fig. 4, the number of the first sub-pixels 121 may be the same as the number of the second sub-pixels 131, and the plurality of first sub-pixels 121 and the plurality of second sub-pixels 131 are in one-to-one correspondence, so as to ensure that the first sub-pixels 121 and the second sub-pixels 131 are consistent in color matching. For example, the following steps are carried out: the number of the first sub-pixels 121 and the second sub-pixels 131 may be 6, the area of each first sub-pixel 121 may be the same, and the area of each second sub-pixel 131 may be the same, but is not limited thereto, and different numbers and different areas of the first sub-pixels 121 and the second sub-pixels 131 may be provided according to the requirement and the size of the pixel island 1, which is within the protection scope of the present disclosure.

In addition, the number of the center subpixels 111 may be the same as the number of the first subpixels 121 and the second subpixels 131 and may correspond to one another, but the number of the center subpixels 111 may be greater than the number of the first subpixels 121 and the second subpixels 131 in order to achieve more color matching. When a pixel structure requires a color scheme, a different number of center subpixels 111 at different locations may be illuminated to achieve the desired color scheme.

Further, the central pixel 11 may be a green pixel, the first annular pixel 12 may be a red pixel, and the second annular pixel 13 may be a blue pixel. Since the device performance of the green pixel is greater than that of the red pixel, and the device performance of the red pixel is greater than that of the blue pixel, it should be noted that the device performance mentioned herein refers to the efficiency of converting electricity into light of the pixel, that is, the luminance of the green pixel per unit area is greater than that of the red pixel per unit area, and the luminance of the red pixel per unit area is greater than that of the blue pixel per unit area. Therefore, in the pixel island 1, the area of the central pixel 11 may be smaller than that of the first annular pixel 12, and the area of the first annular pixel 12 may be smaller than that of the second annular pixel 13, so as to ensure that the brightness of each pixel when all the regions in the pixel island 1 are lit can be the same.

But not limited thereto, the central pixel 11 may also be a red pixel or a blue pixel, the first annular pixel 12 may also be a blue pixel or a green pixel, and the second annular pixel 13 may also be a red pixel or a green pixel, and it is only required to ensure that the area of the region where the green pixel is located is smaller than the area of the region where the red pixel is located, and the area of the region where the red pixel is located is smaller than the area of the region where the blue pixel is located.

The projection of the pixel island 1 on the substrate may be circular, that is: the projection of the central pixel 11 on the substrate may be circular, the projection of the first annular pixel 12 on the substrate may be circular, and the projection of the second annular pixel 13 on the substrate may be circular. Through setting up pixel island 1 into circular, when can making including a plurality of pixel islands 1 in the pixel structure, adjacent pixel island 1 can be tangent to reduce the distance between the adjacent pixel island 1, and then improved the quantity of pixel island 1 in the pixel structure of unit area, promoted the resolution that shows. However, in order to make the distance between adjacent pixel islands 1 smaller, as shown in fig. 9 and 10, the projection of the pixel islands 1 on the substrate may be set to be rectangular or triangular, so that the adjacent pixel islands 1 can be completely attached, and the display resolution is further improved. It should be noted that the shape of the pixel island 1 is not limited in the present disclosure, and is within the scope of the present disclosure.

When a plurality of pixel islands 1 are included in the pixel structure, the pixel islands 1 may further include a third pixel defining part 16. As shown in fig. 3, the third pixel defining section 16 is provided around the outside of the second ring-shaped pixel 13 so as to separate two adjacent pixel islands 1. Preferably, the third pixel defining part 16 may have the same shape as the first pixel defining part 14, and have a height higher than the upper surface of the second light emitting part 1313 or flush with the upper surface of the second light emitting part 1313. For example, the following steps are carried out: the height of the third pixel defining portion 16 may be 1.5 to 2.0 μm, for example: 1.5 microns, 1.7 microns, 1.9 microns, 2.0 microns, and may be 10 microns wide, but is not so limited. The third pixel defining unit 16 may be fabricated simultaneously with the first pixel defining unit 14, the second pixel defining unit 15, the first partition block 122, the second partition block 112, and the third partition block 132, or may be fabricated separately, which is within the scope of the present disclosure.

In addition, in order to simplify the process and save the cost, only one third pixel defining unit 16 may be provided between the adjacent pixel islands 1, and the adjacent pixel islands 1 may be separated by one third pixel defining unit 16.

Further, the pixel island 1 may further include a cathode layer 18. In order to simplify the process, the cathode layer 18 may be provided over the entire surface of the pixel island 1, that is: the central hole transport layer 1114, the first hole transport layer 1214, and the second hole transport layer 1314 share a single cathode layer 18. Without limitation, the cathode layer 18 may also be disposed on the central hole transport layer 1114, the first hole transport layer 1214, or the second hole transport layer 1314, respectively.

Another embodiment of the present disclosure provides a display panel, which may include the pixel structure described above, and the display panel can significantly increase the number of pixel units in a unit area, so as to significantly improve the resolution of the display panel, and meet the requirement of high resolution of the display panel.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A pixel structure, comprising: at least one pixel island, the pixel island comprising:

the pixel structure comprises a central pixel and a first annular pixel, wherein the first annular pixel is arranged around the outer side of the central pixel and comprises a plurality of first sub-pixels distributed along the circumferential direction and first separation blocks positioned between the adjacent first sub-pixels;

the light emitting colors of the central pixel and the first annular pixel are different, and the light emitting colors of the plurality of first sub-pixels are the same.

2. The pixel structure of claim 1,

the central pixel comprises a plurality of central sub-pixels which are independently controlled, the central sub-pixels comprise central light emitting parts, and the central light emitting parts of the central sub-pixels are mutually connected;

the plurality of first sub-pixels are controlled independently, each first sub-pixel comprises a first light-emitting part, and the first light-emitting parts of the first sub-pixels are disconnected.

3. The pixel structure of claim 2,

the central sub-pixel comprises a central anode part and a central hole injection part positioned between the central anode part and the central light emitting part, the central anode parts of the adjacent central sub-pixels are mutually disconnected and are provided with second separation blocks, the second separation blocks are used for disconnecting the central hole injection parts of the adjacent central sub-pixels,

the first subpixel further includes a first anode part and a first hole injection part between the first anode part and the first light emitting part,

wherein a sum of a height of the central anode portion and a height of the central hole injection portion is less than or equal to a height of the second partition block; the sum of the height of the first anode portion, the height of the first hole injection portion, and the height of the first light emitting portion is less than or equal to the height of the first partition block.

4. The pixel structure according to claim 3, wherein the second spacer includes a first spacer and a second spacer arranged in this order in a direction from the central anode portion to the central light emitting portion, and an outline of an orthographic projection of the first spacer on the second spacer is located inside an outline of the second spacer.

5. The pixel structure of claim 1, wherein the pixel island further comprises:

and the second annular pixel is arranged at the outer side of the first annular pixel in a surrounding manner, comprises a plurality of second sub-pixels and third partition blocks positioned between the adjacent second sub-pixels, the light emitting colors of the second sub-pixels are the same, and the light emitting colors of the second sub-pixels are different from those of the central pixel and the first sub-pixels.

6. The pixel structure according to claim 5, wherein a first pixel defining portion is disposed between the central pixel and the first annular pixel, the first pixel defining portion being disposed around an outer side of the central pixel, and a second pixel defining portion is disposed between the first annular pixel and the second annular pixel, the second pixel defining portion being disposed around an outer side of the first annular pixel.

7. The pixel structure according to claim 5, wherein the number of the first sub-pixels is the same as the number of the second sub-pixels, and the plurality of first sub-pixels and the plurality of second sub-pixels are in one-to-one correspondence.

8. The pixel structure of claim 5,

the central pixel is a green pixel; the first annular pixel is a red pixel; the second ring-shaped pixel is a blue pixel, wherein,

the area of the central pixel is smaller than that of the first annular pixel, and the area of the first annular pixel is smaller than that of the second annular pixel.

9. The pixel structure of claim 5, wherein the pixel structure comprises a plurality of the pixel islands, and wherein adjacent pixel islands are in contact, the pixel islands further comprising:

a third pixel defining section disposed around an outer side of the second ring-shaped pixel.

10. A display panel characterized in that the display panel comprises a pixel structure according to any one of claims 1 to 9.

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