CN114335113A - Display panel, display device and mask plate combined structure - Google Patents

Abstract

The invention discloses a display panel, a display device and a mask plate combined structure, which aims to solve the problems that in the display panel in the prior art, color cast exists, the difficulty of manufacturing openings of a corresponding mask plate is high, the openings do not reach the standard, the parts between adjacent openings are too thin, shadow is too large during evaporation, and color mixing is easy to generate. The display panel comprises a first pixel group and a second pixel group which extend along a first direction, and the first pixel group and the second pixel group are sequentially and alternately arranged in a second direction perpendicular to the first direction; the first pixel group comprises first sub-pixels and second sub-pixels which are sequentially and alternately arranged, and the second pixel group comprises third sub-pixels which are sequentially arranged; the shape of the third sub-pixel is a convex polygon with the number of sides being more than four.

Description

Display panel, display device and mask plate combined structure

Technical Field

The invention relates to the technical field of semiconductors, in particular to a display panel, a display device and a mask plate combined structure.

Background

The organic light-emitting display device structure comprises a substrate, a light-emitting layer and an encapsulation protective layer, wherein the light-emitting layer is mainly formed by sub-pixels which are arranged on the substrate in a matrix manner. Each sub-pixel is typically formed by depositing an organic light-emitting material on the corresponding sub-pixel location through a fine metal mask. With the progress of society, the requirements of display device resolution and display effect are higher and higher.

However, the display panel in the prior art has color cast, and the difficulty of the corresponding mask plate is high when the opening is made, which causes the problem that the opening does not reach the standard and the part between the adjacent openings is too thin, the shadow is too large during evaporation, and color mixing is easily caused.

Disclosure of Invention

The invention provides a display panel, a display device and a mask plate combined structure, which aims to solve the problems that in the display panel in the prior art, color cast exists, the difficulty of manufacturing openings of a corresponding mask plate is high, the openings do not reach the standard, the parts between adjacent openings are too thin, shadow is too large during evaporation, and color mixing is easy to generate.

The embodiment of the invention provides a display panel, which comprises a first pixel group and a second pixel group, wherein the first pixel group and the second pixel group extend along a first direction, the first pixel group and the second pixel group are sequentially and alternately arranged in a second direction, and the second direction is intersected with the first direction; the first pixel group comprises first sub-pixels and second sub-pixels which are sequentially and alternately arranged, and the second pixel group comprises third sub-pixels which are sequentially arranged; the shape of the third sub-pixel is a convex polygon with the number of sides being more than four.

In a possible implementation manner, the periphery of each of the third sub-pixels includes two of the first sub-pixels and two of the second sub-pixels, and the shape of the outer contour enclosed by the two of the first sub-pixels facing the edge of the third sub-pixel and the two of the second sub-pixels facing the edge of the third sub-pixel is similar to the shape of the third sub-pixel.

In a possible implementation manner, the sides of the two first sub-pixels facing the third sub-pixel and the outer contour surrounded by the sides of the two second sub-pixels facing the third sub-pixel form a polygon, and the sides opposite to the third sub-pixel are parallel to each other.

In a possible implementation manner, the first sub-pixel and the second sub-pixel located in the same first pixel group and surrounding the same third sub-pixel are symmetrical about a straight line parallel to the second direction and passing through the center of the third sub-pixel.

In a possible implementation manner, two first sub-pixels surrounding the same third sub-pixel are symmetrical about a straight line which is parallel to the first direction and passes through the center of the third sub-pixel;

the two second sub-pixels surrounding the same third sub-pixel are symmetrical about a straight line which is parallel to the first direction and passes through the center of the third sub-pixel.

In one possible implementation, the third sub-pixels of the second pixel group in two adjacent columns are arranged in a staggered manner.

In a possible embodiment, in the first pixel group of the same column, a straight line passing through a center of each of the first sub-pixels coincides with a straight line passing through a center of each of the second sub-pixels.

In a possible embodiment, in at least one of the first sub-pixel and the second sub-pixel, a corner position where an extension line angle of adjacent two sides is an acute angle is an arc shape.

In one possible embodiment, the third sub-pixel has a hexagonal shape or an octagonal shape.

In one possible embodiment, the first sub-pixel has a diamond shape, and the second sub-pixel has a diamond shape.

In one possible embodiment, the first sub-pixel has a diamond shape, and the corner positions of the diamond shape are arc shapes; the second sub-pixel is in a diamond shape, and the corner position of the diamond shape is in an arc shape.

In a possible implementation, the area of the third sub-pixel is larger than the area of the first sub-pixel, and the area of the third sub-pixel is larger than the area of the second sub-pixel.

In a possible implementation manner, the third sub-pixel is a pixel emitting blue light, the first sub-pixel is a pixel emitting red light, and the second sub-pixel is a sub-pixel emitting green light.

The embodiment of the invention also provides a display device which comprises the display panel provided by the embodiment of the invention.

The embodiment of the invention also provides a mask plate combination structure for manufacturing the display panel, which comprises a first sub-mask plate, a second sub-mask plate and a third sub-mask plate, wherein the first sub-mask plate comprises a plurality of first sub-openings extending along the first direction, the second sub-mask plate comprises a plurality of second sub-openings extending along the first direction, and the third sub-mask plate comprises a plurality of third sub-openings extending along the first direction; the shape of the third sub-opening is a convex polygon with the number of sides being more than four.

In a possible embodiment, the shape of the third sub-opening is hexagonal or octagonal; the first sub-opening is in a diamond shape; the shape of the second sub-opening is a diamond shape.

In a possible embodiment, in at least one of the first sub opening and the second sub opening, a corner position where an extension line included angle of adjacent two sides is an acute angle is an arc shape.

The embodiment of the invention has the following beneficial effects: in the embodiment of the invention, the third sub-pixel is in the shape of a convex polygon with the number of sides greater than four, compared with a rectangle, the convex polygon can increase the width of the third sub-pixel in the second direction and increase the ratio of the transverse direction to the longitudinal direction of the third sub-pixel, so that the problem that if the flatness of a film layer below the area where the third sub-pixel is located of the light-emitting layer is poor, the larger area of the third sub-pixel is not flat, and the third sub-pixel generates color cast can be solved; and the shape of the third sub-pixel is a convex polygon with the number of sides larger than four, and the width-length ratio of the opening corresponding to the third sub-pixel is increased to a great extent when a fine metal mask plate corresponding to the third sub-pixel is manufactured, so that the mask plate is favorable for being easier to etch a shape close to a design value when the opening corresponding to the third sub-pixel is formed by wet etching, and meanwhile, the thickness of a connecting bridge between two adjacent third sub-pixels in the first direction is not too thin, so that the vapor deposition shadow can be effectively reduced, and the color mixing risk is reduced.

Drawings

Fig. 1 is a schematic view of a display panel according to an embodiment of the invention;

FIG. 2 is an enlarged schematic view of a portion of a display panel according to an embodiment of the invention;

FIG. 3 is a second schematic diagram of a display panel according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a first sub-pixel and a second sub-pixel having corner deletions according to an embodiment of the invention;

fig. 5 is a schematic view of a mask plate combination structure according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

In the conventional real RGB display panel, the B pixels are strip-shaped, and in a high resolution product, the length-width ratio is larger, and if the TFT circuit below the light emitting layer has poor flatness, and further color misregistration is caused. In addition, the mask plate corresponding to the display panel has great difficulty in manufacturing the strip-shaped pixel opening, and generally causes the problems that the opening size does not reach the standard or the plate thickness of the adjacent opening is too thin, the shadow is too large during evaporation and the like.

In view of the above, referring to fig. 1, an embodiment of the invention provides a display panel including a first pixel group S1 and a second pixel group S2 extending along a first direction AB, the first pixel group S1 and the second pixel group S2 are alternately arranged in sequence in a second direction CD, the second direction CD intersects with the first direction AB, and specifically, the second direction CD and the first direction AB may be perpendicular to each other; the first pixel group S1 includes first and second sub-pixels 1 and 2 alternately arranged in sequence, and the second pixel group S2 includes a third sub-pixel 3 arranged in sequence; the third sub-pixel 3 is shaped as a convex polygon with a number of sides greater than four. Specifically, for example, the shape of the third sub-pixel 3 is hexagonal or eight deformed.

In the embodiment of the present invention, the third sub-pixel 3 is in the shape of a convex polygon with more than four sides, compared to a rectangle, the convex polygon can increase the width of the third sub-pixel 3 in the second direction CD, and increase the ratio of the lateral direction to the longitudinal direction of the third sub-pixel 3, thereby improving the problem that if the flatness of the film layer under the area of the third sub-pixel 3 is poor, the third sub-pixel 3 is color-shifted due to the uneven larger area of the third sub-pixel 3 (specifically, for example, if the width of the third sub-pixel 3 in the second direction CD is wider, such as a hexagon, the effect of vertical edges can be reduced, if the width of the third sub-pixel 3 in the second direction CD is narrow, such as a rectangle, the entire third sub-pixel 3 may be tilted, wherein, the angular color shift in the second direction CD is more susceptible to the flatness of the underlying film layer as the pixel is narrower); moreover, the shape of the third sub-pixel 3 is a convex polygon with the number of sides greater than four, and a Fine Metal Mask (FMM) corresponding to the third sub-pixel 3 is manufactured, so that the width-to-length ratio of an opening corresponding to the third sub-pixel 3 is increased to a great extent, which is beneficial to the Mask to easily carve a shape close to a design value when the opening corresponding to the third sub-pixel 3 is formed by wet etching, and meanwhile, the thickness of a connecting bridge between two adjacent third sub-pixels 3 in the first direction AB is not too thin, so that vapor deposition shadows can be effectively reduced, and the color mixing risk is reduced.

Specifically, in the embodiment of the present invention, in a direction parallel to the second direction CD, a first sub-pixel 1, a second sub-pixel 2, and a third sub-pixel 3 which are adjacent in sequence form a light emitting pixel C, where in different light emitting pixels C, the area of the first sub-pixel 1 is the same, the area of the second sub-pixel 2 is the same, and the area of the third sub-pixel 3 is the same; moreover, unlike a diamond-shaped display panel, the GGRB improves the resolution through sub-pixel rendering, and the display panel in the embodiment of the invention has real resolution and better display effect.

In one possible embodiment, as shown in fig. 1 and fig. 2, the periphery of each third sub-pixel 3 includes two first sub-pixels 1 and two second sub-pixels 2, and the outer contour shape S3 enclosed by the two first sub-pixels 1 facing the third sub-pixel 3 and the two second sub-pixels 2 facing the third sub-pixel 3 is similar to the shape of the third sub-pixel 3. Specifically, for example, as shown in fig. 2, the outer contour shape S3 surrounded by the right side of the first sub-pixel 1 on the upper left side, the left side of the first sub-pixel 1 on the upper right side, the right side of the second sub-pixel 2 on the lower left side, and the left side of the second sub-pixel 2 on the lower right side is a hexagon, and the hexagon is similar to the shape of the third sub-pixel 3. In the embodiment of the present invention, two first sub-pixels 1 and two second sub-pixels 2 are arranged around the periphery of each third sub-pixel 3, and the outer contour shape S3 enclosed by the edges of the two first sub-pixels 1 facing the third sub-pixel 3 and the edges of the two second sub-pixels 2 facing the third sub-pixel 3 is similar to the shape of the third sub-pixel 3, so that the first sub-pixels 1, the second sub-pixels 2 and the third sub-pixels 3 can be closely arranged, thereby avoiding the waste of space and being beneficial to improving the resolution.

In one possible embodiment, as shown in fig. 1 and 2, the outer contour shape S3 enclosed by the two sides of the first sub-pixel 1 facing the third sub-pixel 3 and the two sides of the second sub-pixel 2 facing the third sub-pixel 3 is parallel to the sides opposite to the shape of the third sub-pixel 3, i.e. the sides of the outer contour shape S3 and the sides corresponding to the shape of the third sub-pixel 3 are parallel to each other.

In one possible implementation, as shown in fig. 1, the first sub-pixel 1 and the second sub-pixel 2 (the first sub-pixel 1 and the second sub-pixel 2 on the left side of the dashed line box X1 in fig. 1) located in the same first pixel group S1 and surrounding the same third sub-pixel 3 are symmetrical with respect to a straight line k1 parallel to the second direction CD and passing through the center of the third sub-pixel 3.

In one possible embodiment, as shown in fig. 1, two first sub-pixels 1 (two first sub-pixels 1 on the upper side in the dashed-line box X1 in fig. 1) surrounding the same third sub-pixel 3 are symmetrical with respect to a straight line k2 parallel to the first direction AB and passing through the center of the third sub-pixel 3; two second sub-pixels 2 (two second sub-pixels 2 on the lower side in the dashed-line box X1 in fig. 1) arranged around the same third sub-pixel 3 are symmetrical with respect to a straight line k2 parallel to the first direction AB and passing through the center of the third sub-pixel 3. In this way, the first sub-pixels 1 in the same row are all aligned, and the second sub-pixels 2 in the same row are all aligned, so that the jaggy feeling when displaying the horizontal line is prevented.

In one possible embodiment, as shown in fig. 1, the third sub-pixels 3 of the second pixel group S2 in two adjacent columns are arranged in a staggered manner. Therefore, the space waste can be reduced, and the resolution ratio can be improved. Specifically, for example, as shown in fig. 1, a straight line k3 parallel to the second direction CD at the center of the third sub-pixel S3 in the first-column second pixel group S2 from the left does not coincide with a straight line k4 parallel to the second direction CD at the center of the third sub-pixel S3 in the second-column second pixel group S2 from the left; specifically, in the first-column second pixel group S2 from the left, the straight line k3 parallel to the second direction CD at the center of the third sub-pixel S3 may be located at the gap between two adjacent third sub-pixels 3 of the second-column second pixel group S2 from the left.

In one possible embodiment, as shown in fig. 1, in the first pixel group S1 in the same column, the straight line k5 passing through the center of each first sub-pixel 1 coincides with the straight line k6 passing through the center of each second sub-pixel 2.

In one possible embodiment, as shown in fig. 3 and 4, in at least one of the first sub-pixel 1 and the second sub-pixel 2, a corner missing part 4 is provided at a corner position where an extension line angle of two adjacent sides is an acute angle. Specifically, in at least one of the first sub-pixel 1 and the second sub-pixel 2, a corner position where an extension line included angle of adjacent two sides is an acute angle is an arc shape. Specifically, the first sub-pixel 1 and the second sub-pixel 2 may each have a corner missing part 4 at a corner position where an extension line angle of adjacent two sides is an acute angle. Specifically, as shown in fig. 4, in the first sub-pixel 1, if the included angle between the extension lines of the upper side and the right side is an acute angle, a corner missing part 4 is arranged at the corner position; for example, as shown in fig. 4, in the second sub-pixel 2, if the angle between the upper side and the left extension line is acute, the corner missing portion 4 is provided at the corner position. Specifically, the corner missing part 4 can be understood as cutting off an original acute angle so that an included angle between a new edge formed after cutting off and the original edge is a right angle or an obtuse angle, or so that the new edge formed after cutting off is an outward convex arc.

In one possible embodiment, as shown in fig. 1 to 4, the first sub-pixel 1 has a diamond shape, and the second sub-pixel 2 has a diamond shape. In the embodiment of the present invention, the shape of the first sub-pixel 1 is a diamond shape, and the shape of the second sub-pixel 2 is a square shape or a rectangle, so that the width of the first sub-pixel 1 and the width of the second sub-pixel 2 in the second direction CD can be increased, the ratio of the lateral direction to the longitudinal direction of the first sub-pixel 1 and the second sub-pixel 2 can be increased, and further, if the flatness of the film layer under the area where the first sub-pixel 1 and the second sub-pixel 2 are located is poor, the problem that the first sub-pixel 1 and the second sub-pixel 2 generate color shift due to the large area of the first sub-pixel 1 and the second sub-pixel 2 being uneven can be solved.

In one possible embodiment, the first sub-pixel 1 has a diamond shape, and the corner positions of the diamond shape are arc shapes; the second sub-pixel 2 is in the shape of a diamond, and the corner of the diamond is in the shape of an arc.

Specifically, in the embodiment of the present invention, the first sub-pixel 1, the second sub-pixel 2, and the third sub-pixel 3 are all designed to have a diagonal edge in the first direction AB, so that the reflection direction of light on the edge boundary of the pixel (e.g., on the pixel definition layer PDL) can be changed, and the ambient contrast under a large viewing angle can be improved.

In one possible embodiment, as shown in fig. 1 to 4, the area of the third sub-pixel 3 is larger than that of the first sub-pixel 1, and the area of the third sub-pixel 3 is larger than that of the second sub-pixel 2.

It is to be understood that the "shape" described in the embodiments of the present invention may refer to a shape of the anode exposed by the opening of the pixel defining layer, and the "area" described in the embodiments of the present invention may refer to an area of the opening of the pixel defining layer.

In one possible embodiment, as shown in fig. 1 to 4, the third sub-pixel 3 is a pixel emitting blue light, the first sub-pixel 1 is a pixel emitting red light, and the second sub-pixel 2 is a sub-pixel emitting green light.

Based on the same inventive concept, embodiments of the present invention further provide a display panel, including a light emitting layer, where the light emitting layer includes the display panel provided in the embodiments of the present invention. Specifically, the display panel may further include a substrate, a driving layer located on one side of the substrate, a light emitting layer located on one side of the driving layer away from the substrate, and a package protection layer located on one side of the light emitting layer away from the driving layer. The driving layer may specifically include a driving circuit that drives each sub-pixel in the light emitting layer to emit light, and the driving circuit may specifically include a plurality of thin film transistors and a capacitor.

Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises the display panel provided by the embodiment of the invention.

Based on the same inventive concept, an embodiment of the present invention further provides a mask plate combination structure for manufacturing a display panel according to an embodiment of the present invention, as shown in fig. 5, the mask plate combination structure includes a first sub-mask plate Y1, a second sub-mask plate Y2, and a third sub-mask plate Y3, wherein the first sub-mask plate Y1 includes a plurality of first sub-openings T1 extending along a first direction AB, the second sub-mask plate Y2 includes a plurality of second sub-openings T2 extending along the first direction AB, and the third sub-mask plate Y3 includes a plurality of third sub-openings T3 extending along the first direction AB; the third sub opening T3 has a shape of a convex polygon with a number of sides greater than four. Specifically, the first mask Y1 may form the first sub-pixel 1 in the display panel in the embodiment of the present invention, the second mask Y2 may form the plurality of second sub-pixels 2 in the display panel in the embodiment of the present invention, and the third mask Y3 may form the plurality of third sub-pixels 3 in the display panel in the embodiment of the present invention. The shape of the first sub-aperture T1 may be similar to that of the first sub-pixel 1, the shape of the second sub-aperture T2 may be similar to that of the second sub-pixel 2, and the shape of the third sub-aperture T3 may be similar to that of the third sub-pixel 3. In the embodiment of the present invention, the shape of the third sub-opening T3 is a convex polygon with a number of sides greater than four, so that the shape of the third sub-pixel 3 formed by the mask plate combination structure is a convex polygon with a number of sides greater than four, which can improve the problem that if the flatness of the film layer below the area where the third sub-pixel 3 is located is poor, the larger area of the third sub-pixel 3 is not flat, and the third sub-pixel 3 generates color cast; moreover, when the third sub-mask plate Y3 is manufactured, the shape of the third sub-opening T3 is a convex polygon with the number of sides being larger than four, the width-length ratio of the corresponding opening of the third sub-opening T3 is increased, the shape which is close to the design value is easier to etch when the third sub-opening T3 is formed by wet etching, meanwhile, the thickness of a connecting bridge between two adjacent third sub-openings T3 in the first direction AB is not too thin, evaporation shadow can be effectively reduced, and the color mixing risk is reduced.

In one possible embodiment, as shown in fig. 5, the third sub-opening T3 has a hexagonal or octagonal shape; the shape of the first sub opening T1 is a rhombus; the second sub opening T2 has a diamond shape.

In one possible embodiment, referring to fig. 5, in at least one of the first sub-opening T1 and the second sub-opening T2, an opening corner missing part 5 is provided at a corner position where an extension line angle of adjacent two sides is an acute angle. Specifically, at least one of the first sub-opening T1 and the second sub-opening T2 has an arc shape at a corner position where an extension angle between adjacent two sides is an acute angle. Specifically, the opening corner missing part 5 can be understood as cutting off an original acute angle, so that an included angle between a new edge formed after cutting off and the original edge is a right angle or an obtuse angle, or the new edge formed after cutting off is an outward convex arc. In the embodiment of the present invention, in at least one of the first sub-aperture T1 and the second sub-aperture T2, the corner position where the extension line included angle of the adjacent two sides is an acute angle is provided with the aperture corner missing part 5, so that the manufacturing process difficulty of the first sub-mask Y1 and the second sub-mask Y2 can be greatly reduced, the reliability of the display panel design is also improved, and the first sub-aperture T1 and the second sub-aperture T2 are prevented from having two smaller acute angles, respectively, which increases the process difficulty when manufacturing the first sub-mask Y1 and the second sub-mask Y2, and particularly easily etches the acute angle too large in wet etching, so that the connecting part between the first sub-aperture T1 (and/or the second sub-aperture T2) and the first sub-mask Y1 (and/or the second sub-mask Y2) is too small, thereby increasing the risk of color mixing. Compared with the existing FMM manufacturing process for mass production, the manufacturing difficulty of the slender rectangular opening in the FMM manufacturing process is very high, the plate thickness between the openings is often reduced in order to etch an ideal opening size, and the plate thickness reduction may cause FMM strength reduction on one hand, easily damage or wrinkle when a net is stretched, and increase shadow during evaporation on the other hand, and cause problems of color mixing or uneven light emitting brightness and the like.

The embodiment of the invention has the following beneficial effects: in the embodiment of the present invention, the third sub-pixel 3 is in the shape of a convex polygon with a number of sides greater than four, and compared with a rectangle, the convex polygon can increase the width of the third sub-pixel 3 in the second direction CD, and increase the ratio of the lateral direction to the longitudinal direction of the third sub-pixel 3, so as to improve the problem that if the flatness of the film layer below the area where the third sub-pixel 3 is located of the light-emitting layer is poor, the larger area of the third sub-pixel 3 is not flat, which may cause color cast of the third sub-pixel 3; moreover, the shape of the third sub-pixel 3 is a convex polygon with the number of sides greater than four, and a Fine Metal Mask (FMM) corresponding to the third sub-pixel 3 is manufactured, so that the width-to-length ratio of an opening corresponding to the third sub-pixel 3 is increased to a great extent, which is beneficial to the Mask to easily carve a shape close to a design value when the opening corresponding to the third sub-pixel 3 is formed by wet etching, and meanwhile, the thickness of a connecting bridge between two adjacent third sub-pixels 3 in the first direction AB is not too thin, so that vapor deposition shadows can be effectively reduced, and the color mixing risk is reduced.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (17)

1. The display panel is characterized by comprising a first pixel group and a second pixel group which extend along a first direction, wherein the first pixel group and the second pixel group are sequentially and alternately arranged in a second direction, and the second direction is intersected with the first direction; the first pixel group comprises first sub-pixels and second sub-pixels which are sequentially and alternately arranged, and the second pixel group comprises third sub-pixels which are sequentially arranged; the shape of the third sub-pixel is a convex polygon with the number of sides being more than four.

2. The display panel according to claim 1, wherein the periphery of each of the third sub-pixels includes two of the first sub-pixels and two of the second sub-pixels, and the outer contour shape enclosed by the two of the first sub-pixels facing the edge of the third sub-pixel and the two of the second sub-pixels facing the edge of the third sub-pixel is similar to the shape of the third sub-pixel.

3. The display panel according to claim 2, wherein edges of the two first sub-pixels facing the third sub-pixel and edges of the two second sub-pixels facing the third sub-pixel define an outer contour shape parallel to an edge opposite to the shape of the third sub-pixel.

4. The display panel according to claim 3, wherein the first sub-pixel and the second sub-pixel located in the same first pixel group and surrounding the same third sub-pixel are symmetrical with respect to a line parallel to the second direction and passing through a center of the third sub-pixel.

5. The display panel according to claim 3, wherein two of the first sub-pixels surrounding the same third sub-pixel are symmetrical with respect to a line parallel to the first direction and passing through a center of the third sub-pixel;

the two second sub-pixels surrounding the same third sub-pixel are symmetrical about a straight line which is parallel to the first direction and passes through the center of the third sub-pixel.

6. The display panel according to any one of claims 1 to 5, wherein the third sub-pixels of the second pixel group of two adjacent columns are arranged with a shift.

7. The display panel according to any one of claims 1 to 5, wherein in the first pixel group in the same column, a straight line passing through a center of each of the first sub-pixels coincides with a straight line passing through a center of each of the second sub-pixels.

8. The display panel according to any one of claims 1 to 5, wherein at least one of the first subpixel and the second subpixel has an arc shape at a corner position where an extension line of adjacent two sides forms an acute angle.

9. The display panel according to any one of claims 1 to 5, wherein the third sub-pixel has a hexagonal shape or an octagonal shape.

10. The display panel of claim 9, wherein the first sub-pixel has a diamond shape and the second sub-pixel has a diamond shape.

11. The display panel according to claim 9, wherein the first sub-pixel has a diamond shape, and a corner position of the diamond shape is an arc shape; the second sub-pixel is in a diamond shape, and the corner position of the diamond shape is in an arc shape.

12. The display panel according to any one of claims 1 to 4, wherein an area of the third subpixel is larger than an area of the first subpixel, and an area of the third subpixel is larger than an area of the second subpixel.

13. The display panel according to any one of claims 1 to 5, wherein the third subpixel is a pixel emitting blue light, the first subpixel is a pixel emitting red light, and the second subpixel is a subpixel emitting green light.

14. A display device characterized by comprising the display panel according to any one of claims 1 to 13.

15. A mask combination structure for manufacturing a display panel according to any one of claims 1 to 13, wherein the mask combination structure comprises a first sub-mask, a second sub-mask and a third sub-mask, wherein the first sub-mask comprises a plurality of first sub-openings extending along a first direction, the second sub-mask comprises a plurality of second sub-openings extending along the first direction, and the third sub-mask comprises a plurality of third sub-openings extending along the first direction; the shape of the third sub-opening is a convex polygon with the number of sides being more than four.

16. A mask plate combination structure according to claim 15, wherein the third sub-opening is hexagonal or octagonal in shape; the first sub-opening is in a diamond shape; the shape of the second sub-opening is a diamond shape.

17. A mask plate combination structure according to claim 16, wherein in at least one of the first sub-opening and the second sub-opening, a corner position where an extension line included angle of adjacent two sides is an acute angle is arc-shaped.

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