PIXEL ARRAY STRUCTURE, DISPLAY PANEL AND DISPLAY DEVICE

Abstract

The present invention relates to a pixel array structure, which includes a plurality of first pixel units and a plurality of second pixel units alternately arranged in a first direction and a second direction, each of the first pixel units and the second pixel units including a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the first sub-pixel being located on one side of a connecting line connecting the center of the third sub-pixel to the center of the fourth sub-pixel, and the second sub-pixel being located on the other side of the connecting line connecting the centers of the third sub-pixel and the fourth sub-pixel, and the sub-pixel array structure of the second pixel unit is a mirror image of the sub-pixel array structure of the first pixel unit when rotated by a predetermined angle.

Description

[Technical field]

[0001] The present invention relates to the field of display technology, and in particular to a pixel array structure, a display panel and a display device. [Background technology]

[0002] This application claims priority to the patent application for "Pixel array structure, display panel and display device" filed with the China Patent Office on July 1, 2020, with application number 2020106221094, the patent application for "Pixel array structure, display panel and display device" filed with the China Patent Office on July 1, 2020, with application number 2020106221107, and the patent application for "Pixel array structure, display panel and display device" filed with the China Patent Office on July 1, 2020, with application number 2020106220956, the contents of which are all incorporated herein by reference.

[0003] With the development of display technology, the requirements for the resolution of display panels are also increasing. Due to advantages such as high display quality, the application range of high-resolution display panels is becoming wider and wider. Usually, the resolution of a display device can be improved by reducing the size of a sub-pixel and the spacing between the sub-pixels. However, the reduction in the size of the sub-pixel and the spacing between the sub-pixels also increases the requirements for the precision of the manufacturing process, which increases the difficulty and cost of the manufacturing process of the display device.

[0004] Sub-pixel rendering (SPR) technology utilizes the difference in resolution of sub-pixels of different colors as perceived by the human eye, changing the conventional mode of simply defining one pixel by three sub-pixels of red, green, and blue, and sharing sub-pixels of colors with low resolution at specific positions between different pixels, thereby simulating and realizing the expression ability of the same pixel resolution using relatively fewer sub-pixels, thereby reducing the difficulty and cost of the manufacturing process. Summary of the Invention [Problem to be solved by the invention]

[0005] Based on this, it is necessary to provide a pixel array structure, a display panel and a display device which can realize high resolution and effectively improve the color edge phenomenon and the display effect. [Means for solving the problem]

[0006] According to a first aspect of the present invention, there is provided a pixel array structure including a plurality of first pixel units and a plurality of second pixel units, the plurality of first pixel units and the plurality of second pixel units are alternately arranged in a first direction and a second direction, each of the first pixel units and the second pixel units includes a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the first sub-pixel is located on one side of a connecting line connecting a center of the third sub-pixel and a center of the fourth sub-pixel, and the second sub-pixel is located on the other side of a connecting line connecting a center of the third sub-pixel and a center of the fourth sub-pixel, a sub-pixel array structure of the second pixel units rotated by a predetermined angle is mirror-symmetric with the sub-pixel array structure of the first pixel unit, and the predetermined angle is greater than 0° and less than 360°.

[0007] In the above pixel array structure, the sub-pixel array structure of the second pixel unit rotated by a predetermined angle is a mirror image of the sub-pixel array structure in the first pixel unit, thereby achieving a balance between the close arrangement of the sub-pixels and the spacing between the sub-pixels, thereby achieving high resolution while also reducing the risk of color bleeding and color shift, and improving color edges and visual graininess.

[0008] According to a second aspect of the present invention, there is provided a pixel array structure including a first pixel unit, the first pixel unit including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, wherein within the first pixel unit, the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel form a triangle with a shared side that does not overlap in area with each other, with the center of the first sub-pixel and the center of the second sub-pixel being the vertex of the shared side of the triangle, the second sub-pixel has a second major axis and a second minor axis, and within the first pixel unit, a center line along the major axis direction of the second sub-pixel does not pass through the center of the third sub-pixel and / or the fourth sub-pixel.

[0009] According to a third aspect of the present invention, there is provided a pixel array structure including a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, wherein a virtual rectangle is formed by connecting a center of two aligned first sub-pixels and a center of two aligned second sub-pixels as vertices, the virtual rectangle has two equal sides arranged opposite to each other, and a short side and a long side connecting the vertices of the equal sides arranged opposite to each other, the short side of the virtual rectangle and the long side of the virtual rectangle are not parallel to each other, one third sub-pixel or one fourth sub-pixel is arranged in the virtual rectangle, and the third sub-pixel and the fourth sub-pixel emit light of the same color.

[0010] According to a fourth aspect of the present invention, there is provided a display panel including a pixel array structure according to any one of the first to third aspects of the present invention.

[0011] According to a fifth aspect of the present invention, there is provided a display device including a display panel according to the fourth aspect of the present invention. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a schematic diagram of a pixel array. [Diagram 2] FIG. 2 is a structural schematic diagram of a display panel according to an embodiment of the present invention. [Diagram 3]FIG. 2 is a schematic diagram of an arrangement of first pixel units in an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of an arrangement of second pixel units in an embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic diagram of a pixel arrangement of an overlap unit in one embodiment of the present invention. [Figure 6] FIG. 2 is a schematic diagram of a display matrix arrangement in one embodiment of the present invention. [Figure 7] FIG. 2 is a schematic diagram of a partial structure of a pixel array structure in one embodiment of the present invention. [Figure 8] FIG. 2 is a schematic diagram of a pixel array structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] In order to facilitate an understanding of the present invention, the present invention will now be described more fully with reference to the associated drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be embodied in many different forms and is not limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the present disclosure.

[0014] It should be understood that the terms "first," "second," etc. may be used herein to describe each type of element, but do not denote any sequentiality, number, or importance, but are merely used to distinguish different compositional parts. These terms are merely used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the present invention. Words such as "comprises" or "comprising" mean that the elements or objects appearing before the word cover the exemplary elements or objects appearing after the word and their equivalents, and do not exclude other elements or objects.

[0015] The OLED display panel is driven by current, and it is necessary to provide a pixel driving circuit connected to the OLED device to provide a driving current to the OLED device so that the OLED device emits light. The OLED device includes at least an anode, a cathode, and an organic light-emitting material located between the anode and the cathode. Taking a top-emitting OLED display panel as an example, the organic light-emitting material has low stability, so it cannot be patterned using a conventional etching process, but instead is patterned using a deposition process using a mask plate. The organic light-emitting material is placed in a vacuum environment, and the organic material is evaporated or sublimated by heating. A mask plate is provided between the chamber for evaporating the organic material and the array substrate to be evaporated, and the mask plate has openings corresponding to the areas that need to be evaporated, and does not have openings in the areas that do not need to be evaporated. The evaporated or sublimated organic material molecules are attached to the array substrate to be evaporated through the openings, thereby directly forming a patterned organic material layer. The mask plate for correspondingly evaporating the light-emitting material layer of each subpixel is a fine metal mask (FMM, Fine Metal Mask), abbreviated as fine mask. Due to limitations in the size of the openings of the fine mask, the size of the spacing between the openings, and the difficulty of stretching, the pixel density (PPI, pixels per inch, hereinafter referred to as pixel density) of the organic light-emitting display panel cannot be further improved by the pixel arrangement of the related art.

[0016] To solve the above problems, the related art uses a sub-pixel rendering technique (SPR, Sub PixeL Rendering) to improve the resolution of a display panel. As shown in FIG. 1, in the case of non-rendering, a pixel includes three sub-pixels, while in the case of rendering, a pixel includes only two sub-pixels, so that the number of pixels is increased by 50% without changing the sub-pixels, and the resolution is further improved. However, in the sub-pixel rendering technique, each pixel includes only two sub-pixels, and in order to realize a full-color display, it is necessary to borrow a color that it cannot display from an adjacent sub-pixel. Therefore, when displaying with such a pixel array structure, a color edge may occur at the edge of the screen due to a difference in the number of sub-pixels of each color in the row direction and / or column direction, or a difference in the protruding degree of the sub-pixel that displays the edge, which may affect the display quality.

[0017] At the same time, in order to provide a display panel with a good luminous effect, it is expected that the sub-pixels can be arranged more uniformly and adjacent sub-pixels of the same color can be designed to share an opening of one mask plate, thereby increasing the area of ​​the opening of the mask plate and reducing the difficulty of alignment. However, when a display panel adopts such a pixel arrangement structure, it is difficult for the human eye to clearly distinguish adjacent sub-pixels of the same color during display, resulting in a situation where two sub-pixels are visually merged into one, resulting in a grainy feeling and affecting the display quality.

[0018] In addition, in order to provide more functions of the terminal device, it is becoming common to provide a photosensitive device in the display area under the screen, for example, a fingerprint recognition device is provided in the display area under the screen. Here, the fingerprint recognition device includes a photosensitive device for acquiring a fingerprint image, the photosensitive device includes an optical sensor, and the optical sensor includes a plurality of pixel points, which respectively receive optical signals reflected at different positions of an object, and convert the received optical signals into electric signals to generate an image of the object. Therefore, the light quantity and contrast of the optical signals received by the pixel points both affect the image quality of the generated object. Thus, there are certain requirements for the light transmittance of the display panel, which further brings difficulties in designing the pixel array structure.

[0019] SUMMARY OF THE DISCLOSURE In order to solve the above problems, embodiments of the present invention provide a pixel array structure, a display panel and a display device that can better improve the above problems.

[0020] FIG. 2 shows a schematic structural diagram of a display panel in one embodiment of the present invention.

[0021] With reference to the drawings, a display panel 100 in at least one embodiment of the present invention includes a display area 10 and a non-display area 20, and the display area 10 displays an image using a plurality of sub-pixels. Specifically, the display area 10 may be rectangular, and the non-display area 20 is provided to surround the display area 10. Of course, the shapes and layouts of the display area 10 and the non-display area 20 include, but are not limited to, the above-mentioned examples. For example, when the display panel 100 is used in a wearable device (e.g., a wristwatch) worn by a user, the display area 10 may have a circular shape. When the display substrate is used for display in a vehicle, the display area 10 and the non-display area 20 may adopt, for example, a circular, polygonal, or other shape. The display area 10 is provided with a plurality of sub-pixels that emit light of different colors, and a sub-pixel means the smallest unit for emitting light (e.g., the smallest addressable unit of the display panel 100).

[0022] Fig. 3 shows a schematic diagram of the arrangement of the first pixel unit in one embodiment of the present invention, Fig. 4 shows a schematic diagram of the arrangement of the second pixel unit in one embodiment of the present invention, Fig. 5 shows a schematic diagram of the pixel arrangement of the overlapping unit in one embodiment of the present invention, Fig. 6 shows a schematic diagram of the arrangement of the display matrix in one embodiment of the present invention, Fig. 7 shows a partial structure schematic diagram of the pixel arrangement structure in one embodiment of the present invention.

[0023] Specifically, referring to FIG. 3 to FIG. 7, a pixel array structure is provided in a first embodiment of the present invention.

[0024] According to a first aspect of the present invention, a pixel array structure in at least one embodiment of the present invention includes a plurality of first pixel units and a plurality of second pixel units. The first pixel units and the second pixel units are adjacent to each other, and the plurality of first pixel units and the plurality of second pixel units are alternately arranged in a first direction and a second direction. For example, as shown in FIG. 5 and FIG. 6, the first direction is the X direction in the figure, and the second direction is the Y direction in the figure. In the first direction, the first pixel units and the second pixel units are alternately arranged, and in the second direction, the first pixel units and the second pixel units are alternately arranged. That is, in the first direction and the second direction, any two adjacent first pixel units are separated by one second pixel unit, and any two adjacent second pixel units are separated by one first pixel unit. In a specific embodiment, the first direction forms an angle of 45° with the row direction, and the second direction is perpendicular to the first direction and forms an angle of 45° with the column direction. In this way, the sub-pixels are compactly arranged, the space is fully utilized, and the aperture ratio is improved.

[0025] The first pixel unit and the second pixel unit each include a first subpixel 12, a second subpixel 14, a third subpixel 16a, and a fourth subpixel 16b. The first subpixel 12, the second subpixel 14, the third subpixel 16a, and the fourth subpixel 16b may be one of a red subpixel, a blue subpixel, and a green subpixel, respectively. Of course, in some other embodiments, the first subpixel 12, the second subpixel 14, the third subpixel 16a, and the fourth subpixel 16b may be a subpixel that emits light of other colors than red, green, and blue, for example, white or yellow, but are not limited thereto. It should be noted that light of different colors has different wavelengths, and the longer the wavelength, the higher the energy of the light, which is more likely to cause attenuation of the organic light-emitting material due to high-energy light, and the subpixel that emits high-energy photons is more likely to attenuate. Since the wavelength of blue light is shorter than that of red light and green light, the energy of blue light is higher, and the organic light-emitting material emitting blue light is easily attenuated, so that the light emitted by the pixel unit is easily reddish, and the color shift phenomenon of white light occurs. In addition, the light emitted by each sub-pixel is reflected and re-reflected between the anode and the cathode due to the microcavity effect, and the light is amplified and constructively interfered, so that the brightness of the light is increased and the color shift is further enlarged. In a preferred embodiment, the light-emitting area of ​​the blue sub-pixel is larger than that of the red sub-pixel and the green sub-pixel, so that the display defects caused by the difference in the attenuation speed of the organic light-emitting material emitting light of different colors can be reduced to a certain extent. For example, specifically, in the embodiment shown in FIG. 3 and FIG. 4, the first sub-pixel 12 is a blue sub-pixel, the second sub-pixel 14 is a red sub-pixel, and the third sub-pixel 16a and the fourth sub-pixel 16b are green sub-pixels. Then, the light-emitting area of ​​the first subpixel 12 is larger than that of the second subpixel 14, which is larger than that of the third subpixel 16a or the fourth subpixel 16b. Note that, in some embodiments, the light-emitting area of ​​the green subpixel may be equal to that of the red subpixel, but since the human eye is sensitive to green light, in other embodiments, the light-emitting area of ​​the green subpixel may be smaller than that of the red subpixel, and is not limited thereto.

[0026] In one pixel unit, the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b each have a triangle with a common side but no overlapping sides, with the centers of the sub-pixels being vertices. Specifically, as shown in Figures 3 and 4, the first sub-pixel 12 is located on one side of a central connecting line c connecting the center of the third sub-pixel 16a to the center of the fourth sub-pixel 16b, and the second sub-pixel 14 is located on the other side of the central connecting line c connecting the center of the third sub-pixel 16a to the center of the fourth sub-pixel 16b. A virtual rectangle is formed by sequentially connecting the centers of the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b, a first triangle (not shown) is formed by connecting the centers of the second sub-pixel 14, the first sub-pixel 12, and the third sub-pixel 16a, and a second triangle is formed by connecting the centers of the second sub-pixel 14, the first sub-pixel 12, and the fourth sub-pixel 16b. The first triangle and the second triangle share a central connecting line d connecting the center of the first sub-pixel and the center of the second sub-pixel as a common side, and the two triangles do not overlap each other. In a preferred embodiment, the triangles sharing the common side are acute-angled triangles, thus making the arrangement of the sub-pixels of the pixel structure uniform and contributing to improving the display effect. Here, each sub-pixel structure in the second pixel unit is mirror-symmetrical to each sub-pixel structure in the first pixel unit after rotating by a predetermined angle. That is, the shape and size (light-emitting area) of the sub-pixels of the same color in the first pixel unit and the sub-pixels of the same color in the second pixel unit are the same, and the sub-pixel structure after the second pixel unit is rotated by a predetermined angle clockwise or counterclockwise is mirror-symmetrical to the structure of the corresponding sub-pixel in the first pixel unit. Here, the predetermined angle is greater than 0° and less than 360°. For example, the sub-pixel arrangement structure of the second pixel unit shown in FIG. 4 is mirror-symmetrical to the sub-pixel arrangement structure of the first pixel unit shown in FIG. 3 in the first direction after rotating by 90° clockwise.

[0027] As can be understood, the pixel arrangement structure directly determines the display effect and ensures the uniformity of the display, as shown in FIG. 1, each sub-pixel is usually arranged as uniformly as possible along the row and column directions according to a certain rule, but such a pixel arrangement structure is prone to color shift, color edge, and visual graininess. In the pixel arrangement structure of the embodiment of the present invention, the sub-pixel arrangement structure of the second pixel unit is mirror-symmetrical to the sub-pixel arrangement structure of the first pixel unit after rotating by a certain angle. In this way, the arrangement of the sub-pixels can be made compact and the spacing between the sub-pixels can be balanced, which contributes to reducing the risk of color bleeding and color shift, and improving the color edge and visual graininess. For example, the third sub-pixel 16a and the fourth sub-pixel 16b can be sub-pixels that are sensitive to the human eye, such as green sub-pixels, and each green sub-pixel can be surrounded by red sub-pixels and blue sub-pixels, which effectively improves color shift. In addition, for example, when the first pixel unit and the second pixel unit are arranged to overlap to form a display matrix, each sub-pixel structure in the second pixel unit is rotated by a certain angle to become a mirror image of each sub-pixel structure in the first pixel unit, so that sub-pixels emitting the same color light are prevented from being arranged in a row or column direction, and the color edge problem of the display edge is effectively improved. Furthermore, by adopting the above-mentioned pixel arrangement structure, the distance between sub-pixels of the same color in the same pixel unit can be appropriately increased, for example, by appropriately increasing the distance between the third sub-pixel 16a and the fourth sub-pixel 16b, which are sensitive to the human eye, while setting the first sub-pixel 12 and the second sub-pixel 14 to be close to each other, it is possible to avoid the graininess of the display caused by the sub-pixels being recognized as one because they cannot be distinguished during display, and it is also possible to form a large light-transmitting spare area Z (see FIG. 5) between adjacent pixel units as much as possible, which contributes to the expansion of the light collection area of ​​the under-screen photosensitive device.

[0028] In some embodiments, the central connecting line d connecting the center of the second sub-pixel 14 to the center of the first sub-pixel 12 and the central connecting line c connecting the center of the third sub-pixel 16a to the center of the fourth sub-pixel 16b in the same pixel unit are not equal in length. As can be easily understood, the light-emitting areas of sub-pixels emitting different colors of light are usually different, for example, the light-emitting area of ​​the blue sub-pixel is larger than the light-emitting area of ​​the red sub-pixel and the green sub-pixel. By designing the length of the central connecting line d to be unequal to the length of the central connecting line c, it can be ensured that the interval between the second sub-pixel 14 and the first sub-pixel 12 and the interval between the third sub-pixel 16a and the fourth sub-pixel 16b meet a predetermined condition. This allows the sub-pixels to be arranged as closely as possible and improves the distribution uniformity of the sub-pixels of sensitive colors, thereby improving the visual resolution and display quality.

[0029] In some embodiments, the length of the central connecting line a connecting the center of the second subpixel 14 to the center of the third subpixel 16a in the first pixel unit is not equal to the length of the central connecting line b connecting the center of the second subpixel 14 to the center of the fourth subpixel 16b in the first pixel unit. The length of the central connecting line connecting the center of the second subpixel 14 to the center of the third subpixel 16a in the second pixel unit is not equal to the length of the central connecting line connecting the center of the second subpixel 14 to the center of the fourth subpixel 16b in the second pixel unit. In a specific embodiment, the second subpixel 14 is a red subpixel, the first subpixel 12 is a blue subpixel, and the third subpixel 16a and the fourth subpixel 16b are green subpixels. In the same pixel unit, the lines connecting the centers of the red subpixel and different green subpixels are different in length. In this way, the offset arrangement of the sub-pixels is deepened, and when the first pixel unit and the second pixel unit are arranged in an overlapping manner to form a display matrix, the sub-pixels of the same color are further prevented from being arranged alone in a row, and the protrusion degree of the sub-pixels in the same row or column is weakened, thereby improving the color edge problem at the display edge.

[0030] Note that the center of the sub-pixel may be the geometric center of the shape of the sub-pixel or the center of the emission color of the sub-pixel, but is not limited thereto.

[0031] In some embodiments, in the same pixel unit, if the minimum distance between two adjacent sub-pixels in the first direction and the second direction is n, then the minimum distance between the sub-pixels of different colors that are closest to each other among two adjacent pixel units in the first direction and the second direction is also n. Here, 10 μm < n < 30 μm. In this way, on the one hand, the arrangement of the sub-pixels can be made more uniform, contributing to the improvement of the display quality. On the other hand, the jagged shape due to the crosstalk or interference of the light emission between adjacent sub-pixels can be effectively avoided.

[0032] Furthermore, as shown in FIG. 5, if the minimum distance between the second sub-pixel R1 in the first pixel unit and the third sub-pixel G21 of the second pixel unit arranged adjacent in the second direction is p, then n < p < 3n. If the minimum distance between the second sub-pixel R2 in the second pixel unit and the third sub-pixel G11 of the first pixel unit arranged adjacent in the first direction is q, then n < q < 3n. In this way, a sufficiently large light transmission reserve area Z can be guaranteed, and furthermore, the amount of light required for the normal operation of the photosensitive device under the screen can be satisfied.

[0033] It should be noted that the display panel provided in the embodiment of the present invention may be an organic light-emitting display panel, and the sub-pixel includes at least an anode, a cathode, and a light-emitting layer located between the anode and the cathode, and a voltage is applied between the anode and the cathode by a driving circuit to excite the transition of carriers and act on the light-emitting layer to emit light. In order to avoid crosstalk or interference between adjacent sub-pixels, the display panel may further include a pixel definition layer, which defines a number of pixel openings, and the light-emitting layers of the sub-pixels are disposed within the pixel openings. Therefore, the area of ​​the pixel openings is the light-emitting area of ​​the sub-pixels. However, due to the limitation of deposition technology, in order to ensure that the light-emitting material is completely deposited within the pixel openings, the area of ​​the openings of the mask plate is usually made larger than the area of ​​the pixel openings to leave a deposition margin. For example, as shown in FIG. 3, the inner side of the subpixel is called the pixel side, that is, the boundary of the pixel opening of the pixel definition layer (PDL), and the outer side is called the virtual side of the subpixel, the virtual side being the boundary of the deposition opening of the mask (mask plate). Therefore, in the embodiment of the present invention, the distance between the subpixels is the distance between the pixel sides of two subpixels. Preferably, each pixel side of each subpixel and the corresponding virtual side are parallel to each other, and each pixel side is at the same vertical distance from the corresponding virtual side. In this way, the final arrangement of the subpixels is made more uniform and regular, which effectively improves the fabrication accuracy and pass rate of the emission layer of the subpixels, and reduces the risk of wrinkles when the mask is pulled.

[0034] For example, the first, second, third and fourth sub-pixels may be regular or irregular shapes having major and minor axes, such as an ellipse, a circle, a sector, a dumbbell, a pear, a square, a rectangle, a shape close to a rectangle, a rounded rectangle, a star, or a hard shape. As shown in FIG. 5 and FIG. 6, in a preferred embodiment, the first, second, third and fourth sub-pixels may be rectangular or a shape close to a rectangle. The major axis direction (extension direction) of the first, second, third and fourth sub-pixels crosses the row direction and the column direction. In this way, on the one hand, compared with other shapes of sub-pixels, the arrangement between the sub-pixels is closer, and the sub-pixels of the same color are arranged in a row independently, which can effectively improve the color edge phenomenon. On the other hand, the sub-pixels located on the irregular edge of the display panel are made to conform to the design of the rounded corner, i.e., the inclination of the sub-pixel is tangent to or coincides with the radian of the rounded corner, so as to realize a smooth transition at the rounded corner of each sub-pixel edge, and further improve the problem of jagged edges at the rounded corner. Preferably, the extension directions of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are parallel to the first direction, the row direction and the column direction are perpendicular to each other, and the included angle between the first direction and the row direction or the column direction is 30° to 60°. In this way, the inclination of the sub-pixel is tangent to or coincides with the radian of the rounded corner, so as to realize a smooth transition at the rounded corner of each sub-pixel edge, and further improve the problem of jagged edges at the rounded corner. It should be emphasized that while the human eye is sensitive to screen quality in the horizontal or vertical direction, it is not very sensitive to screen quality in a direction that has an included angle of 45° with the horizontal direction. Therefore, in a preferred embodiment, the included angle between the first direction and the row direction is 45°, as shown in FIG. 6, so that the overall display quality can be improved.As particularly pointed out, the force received by the mask plate is usually transmitted in the row or column direction, for example, the tensile force F of the mask plate is transmitted in the row direction, and the openings of the mask plate with corresponding sub-pixels inclined to the row or column direction can resolve the received force in the row and column directions, thereby avoiding the deformation of the openings due to the concentration of the tensile force F of the FMM, and reducing the difficulty of manufacturing and tensioning the mask plate. And since the openings of the mask plate are inclined, more openings can be provided in a mask plate of the same length and width, reducing the manufacturing cost of the mask.

[0035] Specifically, in one embodiment, the first sub-pixel may be a square or a shape close to a square, the second sub-pixel may be a rectangle or a shape close to a rectangle, and the third and fourth sub-pixels may be a rectangle or a shape close to a rectangle. In this way, the sub-pixels can be closely arranged and the sub-pixels can be offset from each other, thereby effectively improving the color edge. Note that the shape close to a rectangle or a shape close to a square means that the shape of the sub-pixel may not be a strict rectangle or square but may be approximately a rectangle or square due to process limitations or convenience in manufacturing the mask plate, for example, a rounded rectangle or a corner-cut rectangle having rounded corners. Here, the rounded rectangle is a shape formed by rounding the apex corners of a rectangle, and the corner-cut rectangle is a shape formed by cutting one or more apex corners of a rectangle. By making the shape of the sub-pixel a shape close to a rectangle or a square, the aperture ratio of the sub-pixel can be adjusted more flexibly and the limiting conditions in manufacturing the mask plate can be met.

[0036] In some embodiments, the light-emitting areas of the third sub-pixel and the fourth sub-pixel are the same. For example, the third sub-pixel and the fourth sub-pixel may be set as sub-pixels of a color that is sensitive to the human eye. In this way, the resolution can be improved as much as possible, and at the same time, the display can be made more uniform. Furthermore, the light-emitting areas of the second sub-pixel, the third sub-pixel and the fourth sub-pixel may be the same. In this way, the entire sub-pixel array is more compact and uniform, which contributes to improving the display effect. Specifically, in some embodiments, the first sub-pixel has a first long axis and a first short axis, the second sub-pixel has a second long axis and a second short axis, the third sub-pixel has a third long axis and a third short axis, and the fourth sub-pixel has a fourth long axis and a fourth short axis. That is, each sub-pixel has a regular or irregular shape having a long axis and a short axis, such as the above-mentioned rectangle or a shape close to a rectangle. Here, if the third and fourth sub-pixels are sub-pixels of the same color, for example, green sub-pixels, the third and fourth major axes are parallel to each other and have the same length, and the third and fourth minor axes are parallel to each other and have the same length, so that the light-emitting areas of the third and fourth sub-pixels are equal.

[0037] In some embodiments, the ratio of the length of the first major axis to the first minor axis is 1.5 to 1, the ratio of the length of the second major axis to the second minor axis is 5 to 1, and the ratio of the length of the third major axis to the third minor axis is 5 to 1. For example, in the embodiment shown in FIG. 3 and FIG. 4, the first sub-pixel is square, the ratio of the second major axis to the second minor axis is 1, and the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are all rectangular, and the ratio of the major axis to the minor axis of the second sub-pixel, the third sub-pixel, and the fourth sub-pixel is 5:1. In this way, on the premise of ensuring the aperture ratio as much as possible, the sub-pixels are offset from each other to reduce the color edge phenomenon as much as possible. Furthermore, a light-transmitting spare area Z having a large area can be formed between adjacent sub-pixels as much as possible, which contributes to expanding the light collection area of ​​the under-screen photosensitive device.

[0038] The length of the long axis of a subpixel is the maximum size of the light-emitting area of ​​the subpixel in the vertical extension direction, and the length of the short axis of a subpixel is the maximum size of the light-emitting area of ​​the subpixel in the width direction opposite to the vertical extension direction of the light-emitting area of ​​the subpixel.

[0039] In some embodiments, the long sides of the second subpixel 14 are parallel to a pair of opposing sides of the first subpixel 12, the long sides of the third subpixel 16a, and the long sides of the fourth subpixel 16b. As will be appreciated, the first subpixel is square or approximating a square, so that its pair of opposing sides are parallel and of equal length, while the third and fourth subpixels are rectangular or approximating a square, so that they have a pair of parallel long sides and a pair of parallel short sides. For example, as shown in FIG. 3, the first subpixel 12 has a first side and a second side that are opposite to the third and fourth subpixels 16a, 16b, respectively, a third side adjacent to the first side and opposite the second side, and a fourth side opposite to the first side and adjacent to the second and third sides. Here, the first and fourth sides of the first sub-pixel 12 are parallel to the long side of the second sub-pixel 14, and parallel to the long sides of the third and fourth sub-pixels 16a and 16b, thereby contributing to a uniform arrangement of the sub-pixels and further improving the display quality.

[0040] In some embodiments, in the first pixel unit, an extension line of one side of the first sub-pixel 12 close to the edge of the first pixel unit overlaps with an extension line of one short side of the third sub-pixel 16a close to the edge of the first pixel unit on the same side. An extension line of the other side of the first sub-pixel 12 close to the edge of the first pixel unit overlaps with an extension line of a long side of the fourth sub-pixel 16b close to the edge of the first pixel unit on the same side. In a specific embodiment, in one pixel unit, the third side of the first sub-pixel 12 may be collinear with the short side of the third sub-pixel 16a, and the fourth side of the first sub-pixel 12 may be collinear with the long side of the fourth sub-pixel. In this way, it is possible to ensure that the pixel unit has a regular shape, and the arrangement of the sub-pixels is more compact and uniform.

[0041] 3 and 4, in some embodiments, the extension line of the second side of the first sub-pixel 12 does not overlap with the third sub-pixel 16a, and the extension line of the first side does not overlap with the fourth sub-pixel 16b, thereby ensuring the offset arrangement between the sub-pixels and weakening the protruding degree of the sub-pixels at the display edge, and effectively improving the color edge problem at the display edge.

[0042] In some embodiments, the long sides of the second, third and fourth sub-pixels may be the same as the side of the first sub-pixel, thus further making the first pixel unit have a regular shape and making the arrangement of the sub-pixels more compact and uniform.

[0043] In some embodiments, in the first pixel unit, an extension line of at least one of the two long sides of the second subpixel 14 passes through the gap between the first subpixel 12 and the third subpixel 16a. Furthermore, an extension line of one long side of the second subpixel 14 passes through the gap between the first subpixel 12 and the third subpixel 16a, and an extension line of the other long side of the second subpixel 14 overlaps with the side of the first subpixel 12 that is close to the third subpixel 16a. For example, as shown in FIG. 3, an extension line of one long side of the second subpixel 14 passes between the first subpixel 12 and the third subpixel 16a, and an extension line of the other long side of the second subpixel 14 is collinear with the first side of the first subpixel. In the second pixel unit, an extension line of at least one of the two long sides of the second subpixel 14 passes through the gap between the first subpixel 12 and the fourth subpixel 16b. Furthermore, an extension line of one long side of the second subpixel 14 passes through the gap between the first subpixel 12 and the fourth subpixel 16b, and an extension line of the other long side of the second subpixel 14 overlaps with the side of the first subpixel 12 close to the fourth subpixel 16b. For example, as shown in FIG. 4, an extension line of one long side of the second subpixel 14 passes between the first subpixel 12 and the fourth subpixel 16b, and an extension line of the other long side of the second subpixel 14 is collinear with the first side of the first subpixel. In this way, on the premise that the subpixel arrangement is uniform, the size of the light-transmitting spare area Z is guaranteed as much as possible, which contributes to realizing, for example, a bottom-of-screen imaging function. Of course, in some other embodiments, in the first pixel unit, the extension lines of the two long sides of the second subpixel 14 both pass through the gap between the first subpixel 12 and the third subpixel 16a. That is, when the second subpixel 14 is translated in the opposite direction to the first direction, it can pass between the first subpixel 12 and the third subpixel 16a. In the second pixel unit, the extension lines of the two long sides of the second subpixel 14 both pass through the gap between the first subpixel 12 and the fourth subpixel 16b. That is, when the second subpixel 14 is translated in the opposite direction to the second direction, it can pass between the first subpixel 12 and the fourth subpixel 16b.

[0044] 5 and 6, in some embodiments of the present invention, two adjacent first pixel units and two second pixel units form an overlap unit (shown in the dashed frame in FIG. 6), and the overlap units are arranged in a first direction X and a second direction Y, and each overlap unit includes two first pixel units and two second pixel units, respectively, and the two second pixel units are located on one side of a line connecting the geometric centers of the two first pixel units. For example, as shown in FIG. 5 and FIG. 6, the overlap units are arrayed in the first direction and the second direction to form a display matrix. It can be understood that, with the application of the notched screen or display hole-drilling technology, the jagged shape of the irregular edge region (e.g., arc-shaped region) of the display area is also a factor that affects the display quality. Since the sub-pixels in different rows are formed in a stepped manner in the extension direction of the irregular edge region, when the display panel displays an image, the jagged shape of the image in the irregular region becomes deeper, which affects the display effect of the display panel. Therefore, in one embodiment, the overlap units may be arranged in a first direction (X direction) and a second direction (Y direction) intersecting the row direction and the column direction, and as the overlap units are arranged in an overlapping manner, the connecting lines of the edges of the sub-pixels located at the irregular edge of the display area tend to overlap or be parallel to the tangents of the irregular edge, so that the connecting lines of the edges of the sub-pixels are made smoother and closer to the shape of the irregular edge, thereby further reducing the jaggedness of the image at the irregular edge, thereby contributing to improving the display effect of the display panel. Also, the sub-pixels located at the irregular edge of the display area may include various colors, thereby further reducing the color edge formed at the irregular edge of the display panel, thereby further improving the display effect of the display panel.

[0045] 5 and 6, in one overlapping unit, in any one second pixel unit and a first pixel unit adjacent thereto in the first direction X, if the length of the connecting line connecting the center point of the second subpixel R2 in the second pixel unit to the center point of the third subpixel G21 is L1 and the length of the connecting line connecting the center point of the second subpixel R1 in the first pixel unit to the center point of the third subpixel G21 in the second pixel unit is L2, L1 is not equal to L2. In the second pixel unit and another first pixel unit adjacent thereto in the second direction Y, if the length of the connecting line connecting the center point of the second subpixel R2 in the second pixel unit to the center point of the fourth subpixel G12 in the other first pixel unit is L3 and the length of the connecting line connecting the center point of the second subpixel R1 in the other first pixel unit to the center point of the fourth subpixel G12 in the other first pixel unit is L4, L3 is not equal to L4. That is, in the same overlapping unit, the central connecting lines connecting the centers of the red sub-pixels and the centers of the green sub-pixels in two adjacent pixel units are different in length, thus ensuring the offset arrangement of each sub-pixel, and further preventing the same-color sub-pixels from being arranged in a row independently when the first pixel unit and the second pixel unit are arranged in an overlapping arrangement to form a display matrix, and reducing the protruding degree of the sub-pixels in the same row or column, thereby improving the color edge problem at the display edge.

[0046] 6, in one of the overlapping units, a scalene triangle S1 is formed by connecting lines connecting the center points of the second sub-pixel R2, the third sub-pixel G21, and the second sub-pixel R1 in the first pixel unit between any one of the second pixel units and a first pixel unit adjacent thereto in the first direction X. Then, a scalene triangle S2 is formed by connecting lines connecting the center points of the second sub-pixel R1, the fourth sub-pixel G12, and the second sub-pixel R2 in the second pixel unit between the second pixel unit and another first pixel unit adjacent thereto in the second direction Y. That is, in the same overlapping unit, a scalene triangle can be formed by connecting lines connecting the centers of the red sub-pixel in one second pixel unit, the red sub-pixel in a first pixel unit adjacent to the second pixel unit in the row direction and the column direction, and a different green sub-pixel. In this way, when the first pixel unit and the second pixel unit are arranged in an overlapping manner to form a display matrix, it is possible to further avoid sub-pixels of the same color being arranged alone in a column, and also to reduce the protrusion degree of sub-pixels in the same row or column, thereby improving the color edge problem at the display edge.

[0047] In some embodiments, in one overlapping unit, a central connecting line connecting the centers of any two second subpixels does not overlap with a central connecting line connecting the center of any one of the second subpixels and the center of the third subpixel, and a central connecting line connecting the centers of any two second subpixels does not overlap with a central connecting line connecting the center of any one of the second subpixels and the center of the fourth subpixel. For example, in some embodiments, the second subpixel is a red subpixel, the first subpixel is a blue subpixel, and the third and fourth subpixels are green subpixels. A connecting line between any two red subpixels, for example, a central connecting line between the second subpixels R1 and R2 in adjacent pixel units, is not collinear with a central connecting line between any two of R1 / R2 and G11 / G12 / G21 / G22. For example, as shown in FIG. 6, a central connecting line LL1 between the second subpixels R1 and R2 does not overlap with a central connecting line LL2 between the second subpixel R1 and the fourth subpixel G21 of the adjacent pixel unit. In other words, in the same overlapping unit, the central connecting line between the two red sub-pixels R1 and R2 in the first pixel unit and the second pixel unit adjacent in the first direction passes between the blue sub-pixels B2 and G21 located in the same pixel unit in the adjacent first pixel unit and the second pixel unit. Similarly, the central connecting line between the two red sub-pixels R1 and R2 in the first pixel unit and the second pixel unit adjacent in the second direction passes between the blue sub-pixels B1 and G11 located in the same pixel unit in the adjacent first pixel unit and the second pixel unit. In this way, not only can the pixel array structure prevent sub-pixels emitting the same color light as a whole from being arranged in a row, but the protrusion degree of the sub-pixels at the display edge can be further weakened, and the color edge problem at the display edge can be effectively improved.

[0048] In some embodiments, as shown in FIG. 6, in one overlapping unit, the first virtual connecting lines passing through the first subpixel center and the third subpixel center in each first pixel unit are parallel to each other, and the second virtual connecting lines passing through the first subpixel center and the fourth subpixel center in each second pixel unit are parallel to each other, and the first virtual connecting lines and the second virtual connecting lines do not overlap. In a specific embodiment, as shown in FIG. 5 and FIG. 6, in the same overlapping unit, the connecting lines between the centers of B1 and G11 are parallel to each other, i.e., LL3 and LL4 are parallel to each other, and the connecting lines between the centers of B2 and G22 are parallel to each other, i.e., LL5 and LL6 are parallel to each other. And, in the same overlapping unit, the extension lines of the connecting lines of the blue subpixel and the green subpixel in two pixel units with the same subpixel structure are not collinear. In this way, it is possible to avoid the subpixels emitting the same color light as a whole being arranged in a row in the pixel arrangement structure, and to weaken the protruding degree of the subpixels at the display edge, thereby effectively improving the color edge problem at the display edge.

[0049] In some embodiments, as shown in FIG. 6, in one overlapping unit, the center connecting line between the first subpixel and the second subpixel in one first pixel unit does not overlap with the extension line of the center connecting line between the first subpixel and the second subpixel in another first pixel unit, i.e., LL7 and LL8 do not overlap. The connecting line connecting the centers of the first subpixel and the second subpixel in one second pixel unit does not overlap with the extension line of the connecting line connecting the centers of the first subpixel and the second subpixel in another second pixel unit. The connecting line between the centers of the first subpixel and the second subpixel in any one first pixel unit does not overlap with the extension line of the connecting line between the centers of the first subpixel and the second subpixel in any one second pixel unit. That is, as shown in FIG. 5 and FIG. 6, in the same overlapping unit, the extension lines of the connecting lines between the centers of the red subpixel and the blue subpixel in different pixel units are not collinear. For example, the two central connecting lines between the centers of the red subpixels R1 and the blue subpixels B1 in two first pixel units are not collinear, and the two central connecting lines between the centers of the red subpixels R2 and the blue subpixels B2 in two second pixel units are not collinear. It can be seen that the first and second subpixels are located on both sides of the connecting line between the centers of the third and fourth subpixels, and the connecting lines between the centers of the red and blue subpixels of different pixel units in the same overlapping unit are set as non-collinear, so that the subpixels in the same column contain various colors, which effectively improves the color edge problem of the display edge.

[0050] In some embodiments, in one overlapping unit, the third virtual connecting lines passing through the centers of the second sub-pixel and the third sub-pixel in each first pixel unit are parallel to each other, and the fourth virtual connecting lines passing through the centers of the second sub-pixel and the fourth sub-pixel in each second pixel unit are parallel to each other, and the third virtual connecting lines and the fourth virtual connecting lines do not overlap. In a specific embodiment, as shown in Figures 5 and 6, in the same overlapping unit, the extension lines of the connecting lines between the centers of the red sub-pixel and the centers of the green sub-pixel in two pixel units with the same sub-pixel structure are not collinear. In this way, it is possible to avoid the sub-pixels emitting the same color light as a whole being arranged in a row in the pixel array structure, and to reduce the protruding degree of the sub-pixels at the display edge, thereby effectively improving the color edge problem at the display edge.

[0051] It should be emphasized that the light quantity and contrast of the light signal received by the under-screen photosensitive device both affect the image quality of the generated object, and the display panel adopting other pixel arrangement structure has a large light-transmittable area and no difference in the overall light-transmitting area, but the area of ​​the continuous light-transmitting area in a specific area is small, so it cannot meet the light transmittance required for the normal operation of the under-screen photosensitive device. In some embodiments of the present invention, in the first pixel unit and the second pixel unit adjacent to each other in the first direction X, the distance between the second sub-pixel R1 in the first pixel unit and the fourth sub-pixel G21 in the second pixel unit is greater than the distance between the third sub-pixel G11 and the fourth sub-pixel G12 in the first pixel unit and the first sub-pixel R1, for example, L5>L6 and L5>L7, as shown in FIG. 5. In this way, a continuous light-transmitting spare area Z can be formed in each overlapping unit, which improves the light transmittance of the display panel and provides convenience for diversifying the functions of the display panel. In one embodiment, the area of ​​the light-transmitting spare area Z is larger than the light-emitting area of ​​one second sub-pixel R1 / R2.

[0052] As can be understood, each overlap unit includes two first pixel units, two second pixel units, and a light-transmitting spare area Z formed by the gap between adjacent sub-pixels. Preferably, each overlap unit is located within one virtual square, and when the overlap units are arrayed, a number of virtual squares are arrayed with sharing sides to form a display matrix, thus contributing to the uniformity of the display and improving the display effect.

[0053] In some embodiments, as shown in FIG. 7, the pixel array structure includes a virtual polygon formed by arranging four virtual rectangles with their sides shared, and the four virtual rectangles specifically include a first virtual rectangle 30, a second virtual rectangle 40, a third virtual rectangle 50, and a fourth virtual rectangle 60. The first virtual rectangle 30 shares a first shared side g with the third virtual rectangle 50 in the row direction, and shares a second shared side h with the second virtual rectangle 40 in the column direction. The fourth virtual rectangle 60 shares a third shared side j with the third virtual rectangle 50 in the column direction, and shares a fourth shared side i with the second virtual rectangle 40 in the row direction. The sides of the first virtual rectangle 30, the second virtual rectangle 40, the third virtual rectangle 50, and the fourth virtual rectangle 60 away from the shared sides constitute the sides of the virtual polygon. The first sub-pixel is located at a first vertex of each virtual rectangle, the second sub-pixel is located at a second vertex of each virtual rectangle, the first vertex and the second vertex are alternately spaced apart, and the green sub-pixel is located within each virtual rectangle.

[0054] Further, any one side of each of the aforementioned virtual squares is not parallel to the row direction or column direction, or any two sides of each of the aforementioned virtual squares are not equal in length, or any two sides of each of the aforementioned virtual squares are not parallel to each other, or any two interior angles of each of the aforementioned virtual squares are not equal. In this way, the first virtual square, the second virtual square, the third virtual square and the fourth virtual square are all irregular squares, which can form a large light-transmitting region on the premise of satisfying a compact arrangement of the sub-pixels, thereby further improving the light transmittance of the display panel and providing convenience for diversifying the functions of the display panel.

[0055] In some embodiments, in one pixel unit, the aperture area of ​​the first subpixel, the aperture area of ​​the second subpixel, and the aperture area of ​​the third subpixel are offset from each other in the first direction X, i.e., the aperture area of ​​the second subpixel has no projected overlap area with the aperture of the first subpixel and the aperture of the third subpixel in the first direction X. In this way, the arrangement between the subpixels can be made more compact. In other embodiments, at least an extension line of one side of the second subpixel away from the fourth subpixel does not pass through the aperture area of ​​the third subpixel. For example, the aperture area of ​​the second subpixel partially overlaps with the aperture area of ​​the first subpixel in the first direction X, but does not overlap with the aperture area of ​​the third subpixel.

[0056] In some embodiments, the central connecting lines of the green subpixels in the same row and / or column are not linear or approximately linear. For example, as shown in FIG. 5 and FIG. 6, the central connecting lines of the green subpixels in the same row and / or column are jagged. The central connecting lines of two green subpixels in any pixel group in an odd-numbered row or column and the two most adjacent green subpixels in the pixel group in the adjacent even-numbered row or column form a fifth virtual rectangle, and the minimum interior angle γ of the fifth virtual rectangle is ≧60°. In this way, the green subpixels in the adjacent pixel groups are prevented from being too close to each other, and the situation in which the two adjacent green subpixels are difficult to distinguish due to the close distance between the adjacent green subpixels, and the human eye visually recognizes two as one, can be further avoided.

[0057] In the first aspect of the present invention, there is further provided a display panel including the pixel array structure of the above embodiment.

[0058] Referring again to FIG. 3 to FIG. 7, the pixel array structure of the present invention further has the following features.

[0059] The pixel array structure of the present invention includes the first pixel unit. The first pixel unit includes the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b. The first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b may be one of a blue light-emitting sub-pixel, a red light-emitting sub-pixel, and a green light-emitting sub-pixel, respectively. Of course, in some other embodiments, the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b may be sub-pixels that emit light of other colors than blue, red, and green, for example, the third sub-pixel or the fourth sub-pixel may be a white or yellow sub-pixel, but is not limited thereto. It should be noted that light of different colors has different wavelengths, and the shorter the wavelength, the higher the energy of the light, which is more likely to cause attenuation of the organic light-emitting material by light with high energy, and the sub-pixels that emit high-energy photons are more likely to attenuate. Since the wavelength of blue light is shorter than that of red light and green light, the energy of blue light is higher, and the organic light-emitting material emitting blue light is easily attenuated, so that the light emitted by the pixel unit is easily reddish, and the color shift phenomenon of white light occurs. Furthermore, the light emitted by each sub-pixel is reflected and re-reflected between the anode and the cathode due to the Fabry-Perot microcavity effect, and amplification and constructive interference occur, so that the brightness of the light increases and the color shift is further enlarged. In a preferred embodiment, as shown in FIG. 3 and FIG. 4, the first sub-pixel 12 is a blue sub-pixel, the second sub-pixel 14 is a red sub-pixel, and the third sub-pixel 16a and the fourth sub-pixel 16b are green sub-pixels. Here, the light-emitting area of ​​the blue sub-pixel is larger than that of the red sub-pixel and the green sub-pixel, so that the display defect caused by the difference in the attenuation speed of the organic light-emitting material emitting light of different colors can be reduced to a certain extent. As noted, in some embodiments, the emissive area of ​​the green subpixel may be equal to the emissive area of ​​the red subpixel, but since the human eye is more sensitive to green light than red light, in other embodiments, the emissive area of ​​the green subpixel may be smaller than the emissive area of ​​the red subpixel, but is not limited thereto.

[0060] In the first pixel unit, the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b have respective centers as vertices, and the areas of the triangles sharing a common side are not overlapped, and the center of the first sub-pixel 12 and the center of the second sub-pixel 14 are the vertices of the common side of the triangles sharing the common side. Specifically, as shown in Figures 3 and 4, the first sub-pixel 12 is located on one side of the central connecting line c between the third sub-pixel 16a and the fourth sub-pixel 16b, and the second sub-pixel 14 is located on the other side of the central connecting line c between the third sub-pixel 16a and the fourth sub-pixel 16b. The centers of the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b are sequentially connected to form a virtual rectangle, the centers of the first sub-pixel 12, the second sub-pixel 14, and the third sub-pixel 16a are connected to form a first triangle (not shown), and the centers of the first sub-pixel 12, the second sub-pixel 14, and the fourth sub-pixel 16b are connected to form a second triangle. The first triangle and the second triangle share a central connecting line d connecting the center of the first sub-pixel and the center of the second sub-pixel as a common side, that is, the two triangles do not overlap each other in area. In a preferred embodiment, the triangles sharing a side are acute-angled triangles, which makes the arrangement of the sub-pixels in the pixel structure uniform and contributes to improving the display effect.

[0061] Here, the second subpixel has a second major axis and a second minor axis, and in the first pixel unit, the center line of the second subpixel along its major axis does not pass through the center of the third subpixel and / or the fourth subpixel. As will be understood, the major axis direction of the subpixel is the longitudinal extension direction of the light-emitting area of ​​the subpixel, and the minor axis direction of the subpixel is the width direction of the light-emitting area opposite to the longitudinal extension direction of the light-emitting area of ​​the subpixel. Therefore, the center line along the major axis direction of the second subpixel is a straight line passing through the center of the second subpixel along the longitudinal extension direction of the light-emitting area of ​​the subpixel. For example, as shown in FIG. 3, the first triangle and the second triangle have a central connecting line d connecting the center of the first subpixel 12 and the center of the second subpixel 14 as a shared side, and the center line along the major axis direction of the second subpixel 14 is a straight line passing through its center and extending in the major axis direction. The center line along the long axis direction of the second subpixel does not pass through the center of the third subpixel and / or the fourth subpixel, so that the subpixels in the first pixel unit are offset from each other to effectively improve the color edge problem. Furthermore, the projection of the vertex of the shared side of the triangle sharing the side on the opposite side opposite to the vertex is located on the opposite side, and the projection does not overlap with the center of the third subpixel and / or the center of the fourth subpixel. For example, as shown in FIG. 3, the projection of the center of the second subpixel 14 (one vertex of the center connecting line d) on the opposite side e (the center connecting line connecting the center of the first subpixel and the center of the third subpixel) is located on the opposite side e. The projection is located between the center of the first subpixel 12 and the center of the third subpixel 16a, i.e., does not overlap with the center of the third subpixel 16a. Correspondingly, the projection of the center of the first subpixel 12 (the other vertex of the central connecting line d) on the opposite side b (the central connecting line between the second and fourth subpixels) is located on the opposite side b. The projection is located between the center of the second subpixel 14 and the center of the fourth subpixel 16b, i.e., does not overlap with the center of the fourth subpixel 16b. In a preferred embodiment, the projection of the vertex of the shared side of the triangles that share the side on the opposite side of the vertex approaches or is located at the center point of the opposite side. In this way, the arrangement of the subpixels is made uniform, the color edge phenomenon is further avoided, and the display quality is improved.

[0062] Note that the projection of a vertex of a shared side on the side opposite to a vertex of the shared side refers to the projection of the vertex on the opposite side along a direction perpendicular to the opposite side of the vertex, i.e., the intersection point of the opposite side and a vertical line that passes through the vertex and is perpendicular to the opposite side of the vertex. For example, as shown in Fig. 3, one vertex of the shared side d of the first triangle and the second triangle is the center of the second sub-pixel 14, and the intersection point of the opposite side e and a vertical line that passes through the center of the second sub-pixel and is perpendicular to the opposite side e is the projection of the vertex on the opposite side.

[0063] As can be understood, the pixel arrangement structure directly determines the display effect, and in order to ensure the uniformity of the display, the sub-pixels are usually arranged as uniformly as possible in the row and column directions according to a certain rule, but the pixel arrangement structure is also prone to color edges and visual graininess. By adopting the above-mentioned pixel arrangement structure, the uniformity, closeness, and spacing between the sub-pixels can be considered to balance the three, which contributes to reducing the risk of color bleeding and improving the color edges and visual graininess. For example, when forming the display matrix, the sub-pixels are arranged in a staggered manner according to the above-mentioned restrictive conditions, so as to avoid the sub-pixels emitting the same color light being arranged in a single row, and to improve the color edge problem at the display edge. And the staggered sub-pixels make the sub-pixels at the round corners of the display panel more in line with the design of the round corners, i.e., to realize a smooth transition at the round corners of the connecting lines of the edges of the sub-pixels located at the edge, and to be tangent to or coincident with the radian of the round corner, thereby further improving the problem of jagged edges at the round corners. In addition, by adopting the pixel array structure described above, it is possible to appropriately increase the distance between sub-pixels of the same color in the same pixel unit. For example, by appropriately increasing the distance between the third and fourth sub-pixels, which are sensitive to the human eye, while setting the first and second sub-pixels to be close to each other, it is possible to avoid the graininess of the display caused by the human eye perceiving multiple sub-pixels as one because the human eye cannot distinguish the sub-pixels that are sensitive to the human eye during display.

[0064] It should be emphasized that the light quantity and contrast of the light signal received by the under-screen photosensitive device both affect the generated image quality, and the display panel adopting other pixel arrangement structure has many light-transmittable areas and no difference in the overall light-transmitting area, but the area of ​​the continuous light-transmitting area in a specific area is small, so it cannot meet the light transmittance required for the normal operation of the under-screen photosensitive device. The above-mentioned pixel arrangement restriction conditions can also be adopted to form a light-transmitting spare area Z by staggering in one pixel unit, which can contribute to the realization of the manufacture of a display for under-screen imaging. For example, as shown in FIG. 5 and FIG. 6, the first pixel unit and the second pixel unit further include a blank area provided outside the second sub-pixel 14, which is the above-mentioned light-transmitting spare area Z, and the area can be provided in advance as a photosensitive device through which external light penetrates and reaches the under-screen. In a specific embodiment, the light-transmitting spare area Z has a size range of 10 μm to 90 μm in the first direction and a size range of 20 μm to 90 μm in the second direction.

[0065] In some embodiments, the pixel array structure further includes a plurality of second pixel units. The first pixel unit and the second pixel unit are adjacent to each other, and the plurality of first pixel units and the plurality of second pixel units are alternately arranged in the first direction and the second direction. For example, as shown in FIG. 5, the first direction is the X direction, and the second direction is the Y direction. In the first direction, the first pixel units and the second pixel units are alternately arranged, and in the second direction, the first pixel units and the second pixel units are alternately arranged. That is, in the first direction and the second direction, any two adjacent first pixel units are separated by one second pixel unit, and any two adjacent second pixel units are separated by one first pixel unit. It is understood that in some other embodiments, the first direction and the second direction may be crossing other row directions and column directions, but are not limited thereto. For example, as shown in FIG. 6, the included angle between the first direction and the row direction is 45°, and the second direction is perpendicular to the first direction and has an included angle between the first direction and the column direction of 45°.

[0066] In some embodiments, each subpixel structure in the second pixel unit is mirror-symmetric with each subpixel structure in the first pixel unit after being rotated by a predetermined angle. That is, the shape and size (light-emitting area) of the subpixel in the first pixel unit and the subpixel of the same color in the second pixel unit are the same, and the subpixel structure of the subpixel in the second pixel unit after being rotated by a predetermined angle clockwise or counterclockwise is mirror-symmetric with the structure of the corresponding subpixel in the first pixel unit. Here, the predetermined angle is greater than 0° and less than 360°, for example, each subpixel arrangement structure in the second pixel unit shown in FIG. 4 is mirror-symmetric with each subpixel arrangement structure in the first pixel unit shown in FIG. 3 in the first direction after being rotated by 90°. In this way, not only is it possible to avoid that the subpixels emitting the same color are arranged in a row or column direction, but also to weaken the protruding degree of the subpixels located in the same row or column, thereby further improving the color edge problem of the display edge. And the color shift can be effectively improved, for example, the third sub-pixel and the fourth sub-pixel can be sub-pixels of a color that is sensitive to human eyes, such as green sub-pixels, and each green sub-pixel can be surrounded by red and blue sub-pixels, so that the color bleeding is more uniform and the color shift can be improved. In addition, each sub-pixel structure in the second pixel unit is mirror-symmetrical to each sub-pixel structure in the first pixel unit after rotating by a certain angle, so as to form a large light-transmitting spare area Z (see FIG. 6) between adjacent pixel units as much as possible, which contributes to improving the light collection area of ​​the under-screen photosensitive device. It can be understood that in some other embodiments, the sub-pixel structures of the first pixel unit and the second pixel unit can be the same, but are not limited thereto. That is, the minimum overlap unit in the pixel array structure is one pixel unit.

[0067] Further, in some embodiments, in the first direction, the first pixel unit and the adjacent second pixel unit form a first pixel group. In the second direction, the first pixel unit and the adjacent second pixel unit form a second pixel group. In other words, in the first direction, one first pixel unit and one adjacent second pixel unit form a first pixel group, and in the second direction, one first pixel unit and one adjacent second pixel unit form a second pixel group. Specifically, in the embodiments shown in FIG. 5, FIG. 6 and FIG. 7, two first pixel units and two second pixel units form one overlapping unit by using a pixel unit as a unit, and two second pixel units are respectively located on one side of a connecting line of the geometric center of two first pixel units. By using a pixel group as a unit, two adjacent first pixel groups or two adjacent second pixel groups form one overlapping unit, and a plurality of overlapping units are arranged in the first direction and the second direction. Here, in the first pixel group, the center of the third subpixel or the center of the fourth subpixel is located outside the central connecting line of two second subpixels in the first pixel group, and / or in the second pixel group, the center of the third subpixel or the center of the fourth subpixel is located outside the central connecting line of two second subpixels in the second pixel group. In this way, under the premise of ensuring the uniformity of the arrangement of the subpixels as much as possible, when the subpixels are arranged in a staggered manner and the overlapping units are arranged in an overlapping manner to form a display matrix, it is possible to further avoid the subpixels of the same color being arranged in a single row, and to reduce the protruding degree of the subpixels in the same row or column, thereby improving the color edge problem of the display edge. In addition, in order to improve the resolution, the subpixel rendering technology is used, but it is necessary to borrow colors that cannot be displayed from adjacent subpixels to realize full-color display. Therefore, the uniformity of the subpixel arrangement means that the distance between each subpixel is within a reasonable range, and the distance between the subpixels in some areas in the pixel arrangement structure is too small and close, and the distance between the subpixels in some areas is too large and loose, which prevents the display effect from being poor.

[0068] As can be understood, with the application of the hole-drilling technology of the notched screen or display, the jaggedness of the irregular edge region (e.g., arc-shaped region) of the display area is also a factor affecting the display quality. The inventors of the present invention have found through research that since the sub-pixels in different rows are formed in a stepped manner in the extension direction of the irregular edge region, when an image is displayed on the display panel, the jaggedness of the image in the irregular region becomes deeper, which affects the display effect of the display panel. Therefore, in one embodiment, the multiple overlapping units can be arranged in a first direction and a second direction diagonally intersecting with the row direction and the column direction, and the overlapping units are arranged in an overlapping manner, so that the connecting lines of the edges of the multiple sub-pixels located at the irregular edge of the display area tend to overlap or be parallel to the tangent lines of the irregular edge, thereby making the connecting lines of the edges of the multiple sub-pixels smoother and closer to the shape of the irregular edge, and further reducing the jaggedness of the image at the irregular edge, which contributes to improving the display effect of the display panel. In addition, the sub-pixels located at the irregular edge of the display area can include various colors, thereby further reducing the color edge formed at the irregular edge of the display panel, thereby further improving the display effect of the display panel. Preferably, the first direction and the second direction are perpendicular to each other, and the angle between the first direction and the row direction is 45°.

[0069] In some embodiments, the center of the third subpixel 16a or the center of the fourth subpixel 16b is located outside the connecting line connecting the center of the second subpixel 14 in the first pixel unit and the center of the second subpixel 14 in the second pixel unit adjacent to the first pixel unit. In other words, the center of the third subpixel 16a or the center of the fourth subpixel 16b in one pixel unit is located outside the connecting line connecting the center of the second subpixel 14 in the pixel unit in which it is located and the center of the second subpixel 14 in the other adjacent pixel unit. For example, specifically, in some embodiments, as shown in Figures 5 and 6, the extension line of the connecting line connecting the center of the second subpixel R1 in the first pixel unit and the center of the second subpixel R2 in the second pixel unit adjacent to the first pixel unit is offset from the centers of the third subpixel G11 and the fourth subpixel G12 in the first pixel unit, and the centers of the third subpixel G11 and the fourth subpixel G12 are located on both sides of the extension line of the connecting line. In addition, being located outside the central connecting line means that the center of the subpixel is offset from the connecting line connecting the centers of the subpixels and its extension line, for example, the center of the subpixel is located on one side of the central connecting line and its extension line.

[0070] In a preferred embodiment, the first and second subpixels may be blue and red subpixels, respectively, and the third and fourth subpixels may be green subpixels, with the green subpixel having a smaller light-emitting area than the blue and red subpixels. In the same pixel unit, the connecting line d connecting the center of the first subpixel to the center of the second subpixel is not equal in length to the connecting line c connecting the center of the third subpixel to the center of the fourth subpixel. As can be easily understood, the light-emitting areas of subpixels emitting different colors of light are generally different in size, for example, the light-emitting area of ​​the blue subpixel is larger than the light-emitting areas of the red and green subpixels. By designing the length of the central connecting line d to be unequal to the length of the central connecting line c, it is possible to ensure that the interval between the first and second subpixels and the interval between the third and fourth subpixels meet a predetermined condition, thereby arranging each subpixel as closely as possible, improving the distribution uniformity of the subpixels of sensitive colors, improving the visual resolution, and improving the display quality.

[0071] As shown in FIG. 3 and FIG. 4, the length of the connecting line e connecting the center of the first subpixel to the center of the third subpixel in one pixel unit is not equal to the length of the connecting line a connecting the center of the first subpixel to the center of the fourth subpixel in the same pixel unit. Specifically, in one embodiment, the first subpixel is a blue subpixel, the second subpixel is a red subpixel, and the third and fourth subpixels are green subpixels. In the same pixel unit, the center connecting lines of the blue subpixel and the different green subpixels are different in length. In some other embodiments, in one pixel unit, the centers of the third subpixel and the fourth subpixel are not equal in distance to the center of the second subpixel. In this way, on the one hand, adjacent subpixels are prevented from being too close to each other, and the situation in which the two adjacent subpixels are difficult to distinguish due to the close distance between the adjacent subpixels, and the human eye visually recognizes two as one, is further avoided. On the other hand, by setting the lengths of the central connecting lines of the first and second sub-pixels and the third and fourth sub-pixels to be different, the offset arrangement of the sub-pixels is deepened, so that when the first pixel unit and the second pixel unit are overlapped and arranged to form a display matrix, sub-pixels of the same color are further prevented from being arranged alone in a row, and the protrusion degree of sub-pixels in the same row or column is weakened, thereby improving the color edge problem at the display edge.

[0072] Furthermore, the ratio of the distance between the center of the third subpixel and the center of the fourth subpixel and the center of the first subpixel is (3 to 2):(2 to 1). The ratio of the distance between the center of the third subpixel and the center of the fourth subpixel and the center of the second subpixel is also (3 to 2):(2 to 1). As can be understood, in addition to color edge and graininess, important factors affecting display quality include resolution and uniformity. Therefore, by further limiting the ratio of the distance between the center of the third subpixel and the center of the fourth subpixel and the center of the first subpixel and the center of the second subpixel, the subpixel arrangement achieves a good balance between uniformity, compactness, and the degree of misalignment, thereby comprehensively improving the display quality.

[0073] Note that the center of the sub-pixel may be the geometric center of the shape of the sub-pixel or the center of the emission color of the sub-pixel, but is not limited thereto.

[0074] Furthermore, in the same pixel unit, in the first direction and the second direction, if the minimum distance between two adjacent sub-pixels is p, then in the first direction and the second direction, the minimum distance between the sub-pixels of different colors that are closest to each other in two adjacent pixel units is also p. Here, 10 μm < p < 30 μm. In this way, on the one hand, the arrangement of the sub-pixels is made more uniform, contributing to the improvement of the display quality. On the other hand, the jagged shape caused by emission crosstalk or interference between adjacent sub-pixels can be effectively avoided. Note that the display panel provided in the embodiments of the present invention may be an organic light-emitting display panel. The sub-pixel includes at least an anode, a cathode, and a light-emitting layer located between the anode and the cathode. A voltage is applied between the anode and the cathode by a driving circuit to excite the carrier transition, which acts on the light-emitting layer to emit light rays. In order to avoid crosstalk or interference between adjacent sub-pixels, the display panel may further include a pixel definition layer. The pixel definition layer defines a plurality of pixel openings, and the light-emitting layer of the sub-pixel is provided within the pixel opening. Therefore, the area of the pixel opening is the light-emitting area of the sub-pixel. However, since it is limited to the evaporation technology, in order to ensure that the light-emitting material is completely evaporated within the pixel opening, usually, in order to leave an evaporation margin, the area of the opening of the mask plate is made larger than the area of the pixel opening. For example, as shown in FIG. 3, the inner side of the sub-pixel is called the pixel side, that is, the boundary of the pixel opening of the pixel definition layer (PDL layer), and the outer side is called the virtual side of the sub-pixel. The virtual side is the boundary of the evaporation opening of the mask (mask plate). Therefore, in the embodiments of the present invention, the distance between sub-pixels is the distance between the pixel sides of two sub-pixels. Specifically, in the embodiments shown in FIGS. 3 and 4, if two adjacent sub-pixels have two adjacent and parallel pixel sides, the minimum distance between the two adjacent sub-pixels is the vertical distance between the two adjacent and parallel pixel sides.

[0075] Furthermore, assuming that the minimum distance between the second sub-pixel in the first pixel unit and the third sub-pixel of the second pixel unit arranged adjacent in the first direction is q, then p < q < 3p. In this way, a light transmission reserve area Z of sufficient size can be guaranteed, and the amount of light necessary for the normal operation of the under-screen photosensitive device can be satisfied.

[0076] As shown in FIG. 5, FIG. 6 and FIG. 7, in a preferred embodiment, the first, second, third and fourth subpixels may be rectangular or nearly rectangular, and the long axis direction (extension direction) of the first, second, third and fourth subpixels crosses the row and column directions. In this way, on the one hand, compared with other subpixel shapes, the arrangement between the subpixels is closer, and the subpixels of the same color are independently arranged in a row, which can effectively improve the color edge phenomenon. On the other hand, the subpixels located on the irregular edge of the display panel are more in line with the design of the round corner, that is, the inclination of the subpixel is tangent to or coincides with the radian of the round corner, so that the edge of each subpixel is smoothly transitioned at the round corner, and the problem of the jagged edges at the round corner is improved. Preferably, the extension direction of the first, second, third and fourth subpixels is parallel to the first direction, and the included angle with the row or column direction is 30° to 60°. In this way, the inclination of the subpixel can be made to be tangent to or coincident with the radian of the rounded corner, so that the smooth transition at the rounded corner of each subpixel edge can be achieved, and the problem of jagged edges at the rounded corner can be further improved. It should be emphasized that the human eye is sensitive to the screen quality in the horizontal or vertical direction, but is not very sensitive to the screen quality in the direction with an included angle of 45° with the horizontal direction, so that the included angle between the first direction and the row direction is 45° as shown in FIG. 7 as a preferred embodiment, so that the overall display quality can be improved. As specifically pointed out, the force received by the mask plate is usually transmitted in the row direction or column direction, for example, the tensile force F is transmitted in the row direction, and the opening of the mask plate with the corresponding subpixel inclined to the row direction or column direction can resolve the received force in the row direction and the column direction, thereby avoiding the deformation of the opening due to the concentration of the tensile force F of the FMM, and reducing the difficulty of manufacturing and tensile the mask plate. Furthermore, since the openings in the mask plate are provided at an angle, more openings can be provided in a mask plate of the same length and width, thereby reducing the manufacturing costs of the mask.

[0077] Of course, the first, second, third and fourth sub-pixels may have other shapes, and are not limited thereto, for example, the first sub-pixel may be a square, and the second, third and fourth sub-pixels may be rectangular.

[0078] In some embodiments of the present invention, in a shared side of triangles sharing a side, a projection of at least one vertex on the opposite side of the vertex is located between an intersection point between the opposite side and the contours of two sub-pixels corresponding to the opposite side of the vertex as a whole. In other words, an intersection point between a straight line passing through a vertex of a shared side of triangles sharing a side and the opposite side of the vertex is located between an intersection point between an intersection point between an outline of two sub-pixels corresponding to the opposite side of the vertex and the opposite side of the vertex. Furthermore, in one pixel unit, an extension line of a side along the long axis direction of the second sub-pixel or a tangent line of the side does not intersect with the third sub-pixel and / or the fourth sub-pixel as a whole. For example, a projection of a side of a vertex of a sub-pixel corresponding to a shared side of triangles sharing a side is located between an intersection point between an outline of two sub-pixels corresponding to the opposite side of the vertex and the opposite side of the vertex as a whole. In this way, an extension line of a side along the long axis direction of the second sub-pixel or a tangent line of the side does not intersect with the third sub-pixel and / or the fourth sub-pixel as a whole. Specifically, in some embodiments, as shown in Figures 3 and 4, the two vertices of the shared side are the centers of the first and second subpixels, respectively. In order to make the arrangement of the subpixels more uniform and reduce the difficulty of fabrication, two adjacent subpixels have two pixel sides that are opposite and parallel to each other. For example, the first and third subpixels have two pixel sides that are opposite and parallel to each other, and the two pixel sides are the boundaries of the contours of the first and third subpixels. The entire projection of the second subpixel toward the opposite side e is located between the intersection of the opposite side e with the contour of the first subpixel and the contour of the second subpixel, i.e., the projection of the second subpixel toward the opposite side e is located between the intersection of the opposite side e with the two pixel sides of the first and second subpixels that are opposite and parallel to each other. 3, the entire projection of the first subpixel toward the opposite side b is not located between the opposite side b and the central connecting line of the second and third subpixels, but this does not affect understanding of the technical concept. In some other embodiments, the entire projection of the first subpixel toward the opposite side b may be located between the intersection point of the opposite side b and two pixel sides of the second and third subpixels that are parallel to each other and opposed to each other.In this way, on the one hand, the arrangement of the sub-pixels is made more uniform, and on the other hand, the sub-pixels are arranged in a staggered manner to further reduce the color edge phenomenon.

[0079] In the same pixel unit, the first sub-pixel has a first major axis and a first minor axis, the third sub-pixel has a third major axis and a third minor axis, and the fourth sub-pixel has a fourth major axis and a fourth minor axis. That is, each sub-pixel has a regular or irregular shape, such as a rectangle or a shape close to a rectangle, with a major axis and a minor axis. In this way, compared with sub-pixels of other shapes, the arrangement between the sub-pixels is more closely shifted, and the protrusion degree of the sub-pixels is weakened, so that the color edge phenomenon can be effectively improved. Preferably, the third sub-pixel and the fourth sub-pixel are sub-pixels of the same color, for example, both are green sub-pixels, and the third major axis and the fourth major axis are parallel to each other and have the same length, and the third minor axis and the fourth minor axis are parallel to each other and have the same length. Furthermore, the ratio of the first major axis to the first minor axis is 1.5 to 1, the ratio of the second major axis to the second minor axis is 5 to 1, and the ratio of the third major axis to the third minor axis is 5 to 1. For example, in the embodiment shown in Figures 3 and 4, the first sub-pixel is square, the ratio of the first major axis to the first minor axis is 1, and the second, third and fourth sub-pixels are rectangular, the ratio of the major axis to the minor axis of the second, third and fourth sub-pixels is 5:1. In this way, under the premise of ensuring the aperture ratio as much as possible, the sub-pixels are offset from each other to reduce the color edge phenomenon as much as possible. Furthermore, the light-transmitting spare area Z with a large area can be formed between adjacent sub-pixels as much as possible, which contributes to the expansion of the light-collecting area of ​​the under-screen photosensitive device.

[0080] In some embodiments, in the first pixel unit and the second pixel unit adjacent to each other in the first direction, the distance between the second sub-pixel R1 in the first pixel unit and the third sub-pixel G21 in the second pixel unit is greater than the distance between the third sub-pixel G11 and the fourth sub-pixel G12 in the first pixel unit and the second sub-pixel R1. In this way, it is further ensured that the light-transmitting spare area Z can be formed in each overlapping unit, which is continuous and has an area sufficient for the normal operation of the under-screen photosensitive device, thereby improving the light transmittance of the display panel and providing convenience for diversifying the functions of the display panel. In one embodiment, the area of ​​the light-transmitting spare area Z is greater than the light-emitting area of ​​one first sub-pixel R1 / R2.

[0081] As shown in Figures 7 and 8, the pixel array structure includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and a virtual rectangle is formed by connecting the centers of two aligned first sub-pixels and the centers of two aligned second sub-pixels as vertices, and the virtual rectangle includes two equal sides arranged opposite to each other, and a short side and a long side connecting the vertices of the equal sides arranged opposite to each other, and the short side and the long side are not parallel to each other.

[0082] A third sub-pixel or a fourth sub-pixel is disposed within the virtual square, and the third sub-pixel and the fourth sub-pixel emit light of the same color.

[0083] Depending on whether the third sub-pixel or the fourth sub-pixel is disposed within the virtual rectangle, the virtual rectangle is divided into a first virtual rectangle within which the third sub-pixel is disposed and a second virtual rectangle within which the fourth sub-pixel is disposed, and the first virtual rectangle shares a side with the adjacent second virtual rectangle.

[0084] In the first virtual rectangle and the adjacent second virtual rectangle, the sum of the four interior angles formed with the center of the first sub-pixel as a vertex is equal to 360°, and the sum of the four interior angles formed with the center of the second sub-pixel as a vertex is equal to 360°. In this way, the intervals and opposing positions between the sub-pixels are limited by the angles of the virtual rectangles, making the arrangement of the sub-pixels as uniform as possible while maintaining the offset arrangement of the sub-pixels, thereby achieving a balance between display uniformity, compactness, and improvement of color edge problems.

[0085] The length of the first isoside of the first imaginary rectangle is not equal to the length of the second isoside of the second imaginary rectangle, the length of the short side of the first imaginary rectangle is equal to the length of the short side of the second imaginary rectangle, and the length of the long side of the first imaginary rectangle is equal to the length of the long side of the second imaginary rectangle.

[0086] In the column direction, the first virtual rectangle and the adjacent second virtual rectangle share a short side or a long side, and in the row direction, the first virtual rectangle and the adjacent inverted first virtual rectangle share a first isoside as a shared side, and the second virtual rectangle and the adjacent inverted second virtual rectangle share a second isoside as a shared side.

[0087] The pixel array structure includes a virtual polygon formed by arranging four virtual rectangles with their sides shared, and the four virtual rectangles specifically include a first virtual rectangle 30, a second virtual rectangle 40, a third virtual rectangle 50 which is an inversion of the first virtual rectangle 30, and a fourth virtual rectangle 60 which is an inversion of the second virtual rectangle 40.

[0088] The first virtual rectangle shares a first equal side with a third virtual rectangle in the row direction and a short side with a second virtual rectangle in the column direction. The third virtual rectangle shares a long side with a fourth virtual rectangle in the column direction, and the fourth virtual rectangle shares a second equal side with the second virtual rectangle in the row direction.

[0089] The length of the first isoside is not equal to the length of the second isoside.

[0090] The unshared sides of the first imaginary quadrangle, the second imaginary quadrangle, the third imaginary quadrangle, and the fourth imaginary quadrangle form the respective sides of the imaginary polygon.

[0091] The second subpixel is located at the first vertex of each virtual rectangle, the first subpixel is located at the second vertex of each virtual rectangle, the first vertex and the second vertex are alternately arranged and separated, and the third subpixel or the fourth subpixel is located within each virtual rectangle.

[0092] Within the virtual rectangle, a central connecting line between two of the first subpixels is a first diagonal line, a central connecting line between two of the second subpixels is a second diagonal line, and within the virtual rectangle, the centers of the third subpixel and / or the fourth subpixel are offset from the second diagonal line.

[0093] Further, any one side of each of the aforementioned virtual squares is not parallel to the row direction or column direction, or any two opposite sides of each of the aforementioned virtual squares are not parallel to each other, or any two interior angles of each of the aforementioned virtual squares are not equal. In this way, the first virtual square, the second virtual square, the third virtual square and the fourth virtual square are all irregular squares, which forms a large light-transmitting area on the premise of satisfying a compact arrangement of the sub-pixels, thereby further improving the light transmittance of the display panel and providing convenience for diversifying the functions of the display panel.

[0094] As shown in Fig. 3 and Fig. 4, in one pixel unit, the second sub-pixel 14 has a first side and a second side facing the third sub-pixel 16a and the fourth sub-pixel 16b, respectively, a third side adjacent to the first side and facing the second side, and a fourth side facing the first side and connecting with the second side and the third side. Here, the extension lines of the second side and the fourth side are offset from the third sub-pixel 16a, and the extension lines of the first side and the fourth side are offset from the fourth sub-pixel 16b. That is, the third sub-pixel 16a and the fourth sub-pixel 16b are located between the extension lines of the corresponding sides of the second sub-pixel 14. In this way, the compact arrangement of the sub-pixels can be ensured as much as possible, and the protrusion degree of the sub-pixels at the display edge can be weakened, and the color edge problem at the display edge can be effectively improved.

[0095] The central connecting lines of the third sub-pixels located in the same row and / or column are non-linear, and the central connecting lines of the fourth sub-pixels located in the same row and / or column are non-linear. For example, as shown in FIG. 5, FIG. 6 and FIG. 8, the central connecting lines of the green sub-pixels located in the same row and / or column are jagged. The central connecting lines of two green sub-pixels in one pixel group in an odd-numbered row or column and the two most adjacent green sub-pixels in the pixel group in the adjacent even-numbered row or column form a fifth virtual rectangle, and the minimum interior angle γ of the fifth virtual rectangle is ≧60°. In this way, the green sub-pixels in the adjacent pixel groups are prevented from being too close to each other, and the situation in which the two adjacent green sub-pixels are difficult to distinguish due to the close distance between the adjacent green sub-pixels, and the human eye visually recognizes two as one, can be further avoided.

[0096] As can be understood, in some embodiments, the central connecting line of the first sub-pixels in the same row and / or column may be a straight line, and the central connecting line of the second sub-pixels in the same row and / or column may be a straight line, so that the arrangement of the sub-pixels can be made more uniform, which contributes to improving the display quality.

[0097] The present invention provides the following embodiments. Embodiment 1: A pixel array structure including a first pixel unit, the first pixel unit including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, wherein within the first pixel unit, the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel form triangles sharing sides that do not overlap in area with their respective centers as vertices, and the center of the first sub-pixel and the center of the second sub-pixel form vertices of a shared side of the triangle that shares the side, the second sub-pixel has a second major axis and a second minor axis, and within the first pixel unit, a center line along the major axis direction of the second sub-pixel does not pass through the center of the third sub-pixel and / or the fourth sub-pixel. Embodiment 2: A pixel array structure as described in embodiment 1, in which one of the vertices of the shared side of the triangles that share the side is projected onto the opposite side of the vertex and does not overlap with the center of the third sub-pixel or the center of the fourth sub-pixel. Embodiment 3: A pixel array structure described in embodiment 2, in which the projection of a vertex of a shared side of a triangle that shares the side on the opposite side of the vertex is located as a whole within the distance of the intersection of the contours of the two corresponding sub-pixels of the opposite side and the opposite side of the vertex. Embodiment 4: The pixel array structure according to embodiment 3, wherein a projection of a vertex of a shared side of the triangles sharing the side on the opposite side of the vertex approaches or is located at the opposite side center point. Embodiment 5: A pixel array structure described in embodiment 2, wherein, in the first pixel unit, an extension line of a side edge along the long axis direction of the second subpixel or a tangent line to the side edge does not intersect with the third subpixel and / or the fourth subpixel as a whole, and a projection of a subpixel corresponding to a vertex of a shared side of a triangle sharing the side, on the opposite side of the vertex, is located as a whole within the distance of an intersection point between the contours of the two corresponding subpixels on the opposite side and the opposite side of the vertex. Embodiment 6: The pixel array structure of embodiment 1, wherein the third sub-pixel and the fourth sub-pixel are both green light-emitting sub-pixels, the first sub-pixel is a blue light-emitting sub-pixel, and the second sub-pixel is a red light-emitting sub-pixel. Embodiment 7: The pixel array structure of embodiment 1, wherein the pixel array structure further includes the second pixel unit, the first pixel unit and the second pixel unit are arranged alternately, and each sub-pixel structure of the second pixel unit is the same as each sub-pixel structure of the first pixel unit, or each sub-pixel structure of the second pixel unit is mirror-symmetric with each sub-pixel structure of the first pixel unit after rotating by a predetermined angle, and the predetermined angle is greater than 0° and less than 360°. Embodiment 8: The pixel array structure according to embodiment 7, wherein the predetermined angle is 90°. Embodiment 9: A pixel arrangement structure as described in embodiment 7, in which the center of the third subpixel or the center of the fourth subpixel in the first pixel unit is located outside the connecting line or its extension line connecting the center of the second subpixel in the first pixel unit and the center of the second subpixel in the adjacent second pixel unit. Embodiment 10: a pixel array structure according to embodiment 1, wherein each sub-pixel is a regular or irregular shape having a major axis and a minor axis, the first sub-pixel has a first major axis and a first minor axis, the third sub-pixel has a third major axis and a third minor axis, and the fourth sub-pixel has a fourth major axis and a fourth minor axis, the shape of the sub-pixel is selected from the group consisting of an ellipse, a circle, a sector, a dumbbell, a pear, a square, a polygon, a shape close to a rectangle, a rounded rectangle, a star, and a hard shape, and within the first pixel unit, the second major axis, the third major axis, and the fourth major axis are parallel to each other, a ratio between the first major axis and the first minor axis is 1.5 to 1, a ratio between the second major axis and the second minor axis is 5 to 1, a ratio between the third major axis and the third minor axis is 5 to 1, and a ratio between the fourth major axis and the fourth minor axis is 5 to 1. Embodiment 11: The pixel array structure of embodiment 1, wherein the two triangles sharing a common side are acute triangles, and the distances between the center of the third subpixel and the center of the fourth subpixel and the center of the second subpixel are not equal. Embodiment 12: The pixel array structure according to embodiment 11, wherein a ratio of a distance between the center of the third sub-pixel and the center of the fourth sub-pixel and the center of the second sub-pixel is (3 to 2):(2 to 1). Embodiment 13: The pixel array structure of embodiment 1, wherein the first direction and the second direction are perpendicular to each other, the angle between the first direction and the row direction is 45°, and the long axis direction of the sub-pixel of the first pixel unit is parallel to the first direction. Embodiment 14: The pixel array structure of embodiment 1, wherein the first pixel unit further includes a light-transmitting spare area arranged outside the second sub-pixel, the area of ​​the light-transmitting spare area is larger than the minimum light-emitting area of ​​the sub-pixel in the first pixel unit, and the light-transmitting spare area has a size range of 10 μm to 90 μm in a first direction and a size range of 20 μm to 90 μm in a second direction. Embodiment 15: A pixel array structure as described in embodiment 1, in which in the row direction, the connecting lines connecting the centers of the first subpixels in each row are straight lines, the connecting lines connecting the centers of the second subpixels in each row are straight lines, and the connecting lines connecting the centers of the third subpixels or fourth subpixels in each row are non-straight lines or approximately straight lines. Embodiment 16: A pixel array structure as described in embodiment 1, in which the centers of the red subpixels are not aligned in a straight line in the first direction and the second direction, or the centers of the green subpixels are not aligned in a straight line in the first direction and the second direction, or the centers of the blue subpixels are not aligned in a straight line in the first direction and the second direction. In a second aspect of the present invention, there is further provided a display panel including the pixel array structure in the above embodiment.

[0098] Referring again to FIG. 3 to FIG. 7 and combining with FIG. 8, the pixel array structure of the present invention further includes the following features.

[0099] The pixel array structure of the present invention includes the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b. The first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b may be one of a blue light-emitting sub-pixel, a red light-emitting sub-pixel, and a green light-emitting sub-pixel, respectively. Of course, in some other embodiments, the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b may be sub-pixels that emit light of other colors than blue, red, and green, for example, the third sub-pixel 16a or the fourth sub-pixel 16b may be a white or yellow sub-pixel, and is not limited here. It should be noted that light of different colors has different wavelengths, and the longer the wavelength, the higher the energy of the light, which is more likely to cause attenuation of the organic light-emitting material by light with high energy, and the sub-pixels that emit high-energy photons are more likely to attenuate. Since the wavelength of blue light is shorter than that of red light and green light, the energy of blue light is higher, and the organic light-emitting material emitting blue light is easily attenuated, so that the light emitted by the pixel unit is easily reddish, and the color shift phenomenon of white light occurs. Furthermore, the light emitted by each sub-pixel is reflected and re-reflected between the anode and the cathode due to the Fabry-Perot microcavity effect, and amplification and constructive interference occur, so that the brightness of the light increases and the color shift is further enlarged. In a preferred embodiment, as shown in FIG. 3, the first sub-pixel 12 is a blue sub-pixel, the second sub-pixel 14 is a red sub-pixel, and the third sub-pixel 16a and the fourth sub-pixel 16b are green sub-pixels. Here, the light-emitting area of ​​the blue sub-pixel is larger than that of the red sub-pixel and the green sub-pixel, so that the display defect caused by the difference in the attenuation speed of the organic light-emitting material emitting light of different colors can be reduced to a certain extent. As noted, in some embodiments, the emissive area of ​​the green subpixel may be equal to the emissive area of ​​the red subpixel, but since the human eye is more sensitive to green light than red light, in other embodiments, the emissive area of ​​the green subpixel may be smaller than the emissive area of ​​the red subpixel, but is not limited thereto.

[0100] A virtual rectangle is formed by connecting the centers of two aligned first sub-pixels 12 and the centers of two aligned second sub-pixels 14 as vertices. That is, the centers of the two first sub-pixels 12 are the vertices of one pair of diagonal corners of the virtual rectangle, and the centers of the two second sub-pixels 14 are the vertices of the other pair of diagonal corners of the virtual rectangle. For example, as shown in FIG. 7, in a first virtual rectangle 30, two first sub-pixels are arranged in a second direction, and two second sub-pixels are arranged in a first direction, and the centers of the two first sub-pixels and the centers of the two second sub-pixels are sequentially connected to form the virtual rectangle. The first virtual rectangle includes two equal-length opposite sides arranged opposite to each other, and a short side and a long side that connect the vertices of the equal-length opposite sides arranged opposite to each other. 7, in the first virtual rectangle 30, in the column direction, the central connecting line between the first sub-pixels 12 and the second sub-pixels 14 on one side is a first equal length opposite side, and the central connecting line between the first sub-pixels 12 and the second sub-pixels 14 on the other side is a second equal length opposite side. In the row direction, the central connecting line between the first sub-pixels 12 and the second sub-pixels 14 on one side is a long side of the virtual rectangle, and the central connecting line between the first sub-pixels 12 and the second sub-pixels 14 on the other side is a short side of the virtual rectangle.

[0101] In the virtual square, one third sub-pixel or one fourth sub-pixel is arranged, and the third sub-pixel and the fourth sub-pixel emit light of the same color. Specifically, the pixel array structure includes a plurality of virtual squares, the plurality of virtual squares including a first virtual square and a second virtual square that are adjacent to each other and share a side, and one of the third sub-pixels is arranged in the first virtual square, and one of the fourth sub-pixels is arranged in the second virtual square. Specifically, in the embodiment shown in FIG. 7, four virtual squares are arranged with their sides shared, and the four virtual squares specifically include a first virtual square 30, a second virtual square 40, a third virtual square 50 obtained by inverting the first virtual square 30, and a fourth virtual square 60 obtained by inverting the second virtual square 40. The first virtual rectangle 30 shares a first shared side g with the third virtual rectangle 50 in the row direction and a second shared side h with the second virtual rectangle 40 in the column direction. The fourth virtual rectangle 60 shares a third shared side j with the third virtual rectangle 50 in the column direction and a fourth shared side i with the second virtual rectangle 40 in the row direction. The sides of each virtual rectangle away from the shared side constitute the sides of the virtual polygon. The second sub-pixel 14 is located at the first vertex of each virtual rectangle, and the first sub-pixel 12 is located at the second vertex of each virtual rectangle, and the first vertex and the second vertex are alternately arranged apart. One third sub-pixel 16a is provided in the first virtual rectangle 30 and the second virtual rectangle 40, and one fourth sub-pixel 16b is provided in the third virtual rectangle 50 and the fourth virtual rectangle 60.

[0102] Here, the short side of the virtual rectangle and the long side of the virtual rectangle are not parallel. As can be understood, in order to directly determine the display effect and ensure the uniformity of the display, in the pixel arrangement structure shown in FIG. 1, each sub-pixel is usually arranged as uniformly as possible in the row direction and column direction according to a certain rule, but in the conventional pixel arrangement structure, color shift and color edge are also likely to occur. In the above-mentioned pixel arrangement structure, the virtual rectangle has a pair of equal length opposite sides and a pair of long and short sides with different lengths, and the long and short sides are not parallel, so that each sub-pixel is arranged in a shifted manner, and the arrangement uniformity, compactness and spacing between the sub-pixels can be considered to balance the three, which contributes to reducing the risk of color bleeding and improving the problems of color edges and jagged edges. For example, when forming a display matrix, each sub-pixel is arranged in a shifted manner according to the above-mentioned restrictive conditions, which avoids sub-pixels emitting light of the same color being arranged in a single row, and improves the color edge problem of the display edge. The offset sub-pixels allow the sub-pixels located at the round corners of the display panel to be more in line with the round corner design, i.e., the edge connection lines of the sub-pixels at the edges achieve a smooth transition at the round corners and are tangent to or coincident with the radians of the round corners, further improving the problem of jagged edges at the round corners. The third and fourth sub-pixels may be green sub-pixels that are sensitive to human eyes, and are surrounded by blue and red sub-pixels to make the color bleeding more uniform and avoid color shift.

[0103] In some embodiments, in the first virtual rectangle and the adjacent second virtual rectangle, the sum of the four interior angles with the center of the first sub-pixel as a vertex is equal to 360°, and the sum of the four interior angles with the center of the second sub-pixel as a vertex is equal to 360°. In this way, the intervals and opposing positions between the sub-pixels are limited by the angles of the virtual rectangles, and the sub-pixels are arranged as uniformly as possible while maintaining the offset arrangement of the sub-pixels, thereby achieving a balance between display uniformity, compactness, and improvement of color edge problems.

[0104] Furthermore, the length of the first equal length opposite side of the first virtual rectangle is not equal to the length of the second equal length opposite side of the second virtual rectangle, the length of the long side of the first virtual rectangle is equal to the length of the long side of the second virtual rectangle, and the length of the short side of the first virtual rectangle is equal to the length of the short side of the second virtual rectangle. In this way, when forming a display matrix, the sub-pixels are arranged compactly and the uniform and regular arrangement between the sub-pixels is maintained, which contributes to improving the display quality. Specifically, in the column direction, the first virtual rectangle and the adjacent second virtual rectangle share the short side or the long side. Specifically, in the embodiment shown in FIG. 7, in the row direction, the first virtual rectangle 30 and the adjacent third virtual rectangle 50 are inverted and share the first equal length opposite side, and the second virtual rectangle 40 and the adjacent fourth virtual rectangle 60 are inverted and share the second equal length opposite side. In the column direction, the virtual square 30 and the adjacent virtual square 40 share a short side, and the third virtual square 50 and the adjacent fourth virtual square 60 share a long side. That is, the adjacent first virtual square or the adjacent second virtual square has the same structure that is inverted by 180° at a predetermined angle. In this way, when forming the display matrix, on the one hand, the arrangement between each sub-pixel is compact, and on the other hand, the sub-pixels are regularly arranged, and the overlapping units are closer to a regular shape as a whole, which contributes to improving the display quality. On the other hand, the protruding degree of the sub-pixels can be weakened, and the color edge can be effectively improved.

[0105] As can be understood, in some other embodiments, the length of the first equal length opposite side may be equal to the length of the second equal length opposite side, but is not limited thereto, thus further deepening the offset arrangement of the sub-pixels and contributing to the improvement of the color edge.

[0106] In an embodiment of the present invention, the pixel structure includes a first pixel unit and a second pixel unit, the first pixel unit and the second pixel unit are adjacent to each other, and the first pixel units and the second pixel units are alternately arranged in the first direction and the second direction. For example, as shown in Fig. 7 and Fig. 8, in the first direction, the first pixel units and the second pixel units are alternately arranged, and in the second direction, the first pixel units and the second pixel units are alternately arranged. That is, in the first direction and the second direction, any two adjacent first pixel units are separated by one second pixel unit, and any two adjacent second pixel units are separated by one first pixel unit. Moreover, each sub-pixel structure of the first pixel unit and the second pixel unit is mirror symmetrical after rotating 90° opposite to each other. That is, the shape and size (light-emitting area) of the sub-pixels in the first pixel unit and the sub-pixels of the same color in the second pixel unit are the same, and the sub-pixel structure after the sub-pixels in the second pixel unit are rotated clockwise or counterclockwise by a predetermined angle is mirror-symmetrical to the structure of the corresponding sub-pixel in the first pixel unit. Here, the predetermined angle is greater than 0° and less than 360°, for example, the sub-pixel arrangement structure in the second pixel unit shown in FIG. 4 is mirror-symmetrical to the sub-pixel arrangement structure in the first pixel unit shown in FIG. 3 in the first direction after being rotated by 90°. In this way, not only is it possible to avoid the sub-pixels emitting the same color being arranged in a row or column direction, but also to weaken the protruding degree of the sub-pixels located in the same row or column, thereby further improving the color edge problem of the display edge. For example, the third and fourth sub-pixels may be sub-pixels of a color that is sensitive to the human eye, such as green sub-pixels, and each green sub-pixel may be surrounded by a red sub-pixel and a blue sub-pixel, so that color bleeding is more uniform and color shift is improved. In addition, each sub-pixel structure in the second pixel unit is mirror-symmetric with each sub-pixel structure in the first pixel unit after being rotated by a certain angle, so as to form a large light-transmitting spare area Z (see FIG. 7) between adjacent pixel units as much as possible, which contributes to improving the light collection area of ​​the under-screen photosensitive device.It can be understood that in some other embodiments, the sub-pixel structures of the first pixel unit and the second pixel unit may be the same, but is not limited thereto, that is, the minimum overlap unit in the pixel array structure is one pixel unit.

[0107] Here, in the first pixel unit, two non-overlapping acute triangles sharing a side are formed with the centers of the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b as vertices, and the center of the first sub-pixel 12 and the center of the second sub-pixel 14 are the vertices of the shared side of the triangles sharing the side. Specifically, as shown in Figures 3 and 4, the first sub-pixel 12 is located on one side of the central connecting line c between the third sub-pixel 16a and the fourth sub-pixel 16b, and the second sub-pixel 14 is located on the other side of the central connecting line c between the third sub-pixel 16a and the fourth sub-pixel 16b. A virtual rectangle is formed by sequentially connecting the centers of the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b, a first triangle (not shown) is formed by connecting the centers of the first sub-pixel 12, the second sub-pixel 14, and the third sub-pixel 16a, and a second triangle is formed by connecting the centers of the first sub-pixel 12, the second sub-pixel 14, and the fourth sub-pixel 16b. The first and second triangles share a central connecting line d between the centers of the first and second sub-pixels as a common side, and the two triangles do not overlap with each other in area.

[0108] Here, the second sub-pixel 14 and the third sub-pixel 16a are not arranged in the same row in a direction perpendicular to the central connecting line between the first sub-pixel 12 and the third sub-pixel 16a. That is, the second sub-pixel 14 and the third sub-pixel 16a are arranged offset from each other in a direction perpendicular to the central connecting line between the first sub-pixel 12 and the third sub-pixel 16a. In other words, in the virtual rectangle, the central connecting line between the two first sub-pixels is a first diagonal line, the central connecting line between the two second sub-pixels is a second diagonal line, and the centers of the third sub-pixel and / or the fourth sub-pixel are offset from the second diagonal line in the virtual rectangle. In a specific embodiment, the first sub-pixel 12 and the third sub-pixel 16a are arranged in a second direction Y perpendicular to the first direction, and the second sub-pixel 14 and the third sub-pixel 16a are arranged offset from each other in a first direction X perpendicular to the central connecting line between the first sub-pixel 12 and the third sub-pixel 16a. The vertices of the virtual rectangle are respectively located at the centers of the first and second subpixels in the first pixel unit and the centers of the first and second subpixels in two second pixel units adjacent to the first pixel unit, or the vertices of the virtual rectangle are respectively located at the centers of the first and second subpixels in the second pixel unit and the centers of the first and second subpixels in two first pixel units adjacent to the second pixel unit. In this way, not only is it possible to prevent subpixels emitting the same color from being arranged in a row or column direction, but also to reduce the protrusion degree of subpixels located in the same row or column, thereby further improving the color edge problem at the display edge.

[0109] It should be emphasized that the light quantity and contrast of the light signal received by the under-screen photosensitive device both affect the image quality of the generated object. In a display panel using other pixel arrangement structures, the light-transmitting area is large, so there is no difference in the overall light-transmitting area, but the area of ​​the continuous light-transmitting area in a specific area is small, so the light transmittance required for the normal operation of the under-screen photosensitive device cannot be met. Since the second sub-pixel 14 and the third sub-pixel 16a are arranged offset from each other, a light-transmitting spare area Z is formed outside the second sub-pixel 14, which is useful for realizing the manufacture of a display for under-screen imaging. Specifically, as shown in FIG. 7 and FIG. 8, the blank area outside the second sub-pixel R1 / R2 is the above-mentioned light-transmitting spare area Z. Specifically, in one embodiment, the light-transmitting spare area Z has a size range of 10 μm to 90 μm in the first direction and a size range of 20 μm to 90 μm in the second direction.

[0110] In the same pixel unit, the first subpixel 12 and the second subpixel 14 are not arranged in the same row in the direction perpendicular to the central connecting line between the first subpixel 12 and the third subpixel 16a. That is, the second subpixel 14 and the third subpixel 16a are also arranged to be shifted from each other in the direction perpendicular to the central connecting line between the first subpixel 12 and the third subpixel 16a. Furthermore, the center of the second subpixel 14 is one vertex of a shared side of a triangle that shares a side, and a projection of the vertex on the opposite side facing the vertex is located on the opposite side, and the projection does not overlap with the center of the third subpixel 16a and the center of the first subpixel 12. For example, as shown in FIG. 7, a projection of the center of the second subpixel 14 (one vertex of the central connecting line d) on the opposite opposite side e (the central connecting line between the center of the first subpixel 12 and the center of the third subpixel 16a) is located on the opposite side e. The projection is located between the center of the first sub-pixel 12 and the center of the third sub-pixel 16a, i.e., does not overlap with the center of the third sub-pixel 16a, thereby ensuring a perfect offset arrangement between the sub-pixels, preventing sub-pixels of the same color from being arranged in a single row, and weakening the protruding state of the sub-pixels, thereby preventing the occurrence of the color edge phenomenon, and contributing to improving the display quality.

[0111] Note that the projection of a vertex of a shared side on the side opposite to the vertex of the shared side refers to the projection of the vertex on the opposite side in a direction perpendicular to the side opposite to the vertex, i.e., the intersection point of the opposite side and a vertical line that passes through the vertex and is perpendicular to the side opposite to the vertex, is the projection of the vertex on the opposite side described above. For example, as shown in Fig. 7, one vertex of the shared side d of the first triangle and the second triangle is the center of the second sub-pixel 14, and the intersection point of the opposite side e and a vertical line that passes through the center of the second sub-pixel and is perpendicular to the opposite side e is the projection of the vertex on the opposite side described above.

[0112] As shown in Figures 3 and 4, in the same pixel unit, the central connecting line e between the first sub-pixel 12 and the second sub-pixel 14 and the central connecting line c between the third sub-pixel 16a and the fourth sub-pixel 16b cross but are not perpendicular to each other. As can be easily understood, the central connecting lines between the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a and the fourth sub-pixel 16b form a virtual square, and the central connecting line c between the first sub-pixel 12 and the second sub-pixel 14 and the central connecting line d between the third sub-pixel 16a and the fourth sub-pixel 16b are diagonals of the virtual square. Since the second sub-pixel 14 and the third sub-pixel 16a are offset in the first direction and the diagonals of the virtual square are not perpendicular, the sub-pixels in the pixel unit can be closely arranged and the offset degree can be deepened, so that the display color edge can be further weakened. In a preferred embodiment, the first sub-pixel 12 and the second sub-pixel 14 may be blue and red sub-pixels, respectively, and the third sub-pixel 16a and the fourth sub-pixel 16b may be green sub-pixels, and the green sub-pixel has a smaller light-emitting area than the blue sub-pixel. In the same pixel unit, the center connecting line d between the center of the first sub-pixel 12 and the center of the second sub-pixel and the center connecting line c between the center of the third sub-pixel 16a and the center of the fourth sub-pixel 16b are not equal in length. As can be easily understood, the light-emitting areas of the sub-pixels emitting different colors of light are usually different in size, for example, the light-emitting area of ​​the blue sub-pixel is larger than the light-emitting areas of the red sub-pixel and the green sub-pixel. By designing the length of the central connecting line d to be unequal to the length of the central connecting line c, it is possible to ensure that the distance between the first sub-pixel 12 and the second sub-pixel 14, and the distance between the third sub-pixel 16a and the fourth sub-pixel 16b satisfy a predetermined condition, so that the sub-pixels are arranged as closely as possible, and the distribution uniformity of the sensitive color sub-pixels is improved, the visual resolution is improved, and the display quality is improved.

[0113] As shown in FIG. 3 and FIG. 4, the length of the connecting line e between the center of the first subpixel 12 and the center of the third subpixel 16a in the same pixel unit is not equal to the length of the connecting line a between the center of the first subpixel 12 and the center of the fourth subpixel 16b in the same pixel unit. Specifically, in one embodiment, the first subpixel 12 is a blue subpixel, the second subpixel 14 is a red subpixel, and the third subpixel 16a and the fourth subpixel 16b are green subpixels. In the same pixel unit, the lengths of the central connecting lines between the blue subpixel and the different green subpixels are different. In some other embodiments, in one pixel unit, the distances between the centers of the third subpixel 16a and the fourth subpixel 16b to the center of the second subpixel 14 are not equal. In this way, on the one hand, adjacent subpixels are prevented from being too close to each other, and the situation in which the two adjacent subpixels are difficult to distinguish due to the close distance between the adjacent subpixels, and the human eye visually recognizes two as one, is further avoided. On the other hand, by setting the lengths of the central connecting lines between the first sub-pixel 12 and the second sub-pixel 14 and the third sub-pixel 16a and the fourth sub-pixel 16b to be different, the offset arrangement of the sub-pixels is deepened, so that when the first pixel unit and the second pixel unit are overlapped to form a display matrix, sub-pixels of the same color are further prevented from being arranged in a row alone, and the protrusion degree of sub-pixels in the same row or column is weakened, thereby improving the color edge problem at the display edge.

[0114] In the same pixel unit, the ratio of the distance between the center of the third sub-pixel 16a and the center of the fourth sub-pixel 16b and the center of the first sub-pixel 12 is (3 to 2):(2 to 1). The ratio of the distance between the center of the third sub-pixel 16a and the center of the fourth sub-pixel 16b and the center of the second sub-pixel 14 is also (3 to 2):(2 to 1). As can be understood, in addition to color edge and graininess, important factors affecting the display quality are resolution and uniformity. Therefore, by further limiting the ratio of the distance between the center of the third sub-pixel 16a and the center of the fourth sub-pixel 16b and the center of the first sub-pixel 12 and the center of the second sub-pixel 14, the sub-pixel arrangement has a good balance between uniformity, compactness, and degree of misalignment, and the display quality is improved overall. Note that the center of the sub-pixel may be the geometric center of the shape of the sub-pixel or the center of the emission color of the sub-pixel, but is not limited thereto.

[0115] For example, the third sub-pixel 16a and the fourth sub-pixel 16b may have the same light-emitting area. For example, the third sub-pixel 16a and the fourth sub-pixel 16b may be set as sub-pixels with a color that is sensitive to the human eye, in this way, the resolution can be improved as much as possible and at the same time, the display can be made more uniform. Furthermore, the first sub-pixel 12, the third sub-pixel 16a and the fourth sub-pixel 16b may have the same light-emitting area. In this way, the whole array of the sub-pixels is more compact and uniform, which improves the display effect. In a preferred embodiment, the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a and the fourth sub-pixel 16b may all have a rectangular or near-rectangular shape, and the long axis direction of the second sub-pixel 14 and the direction perpendicular to the central connecting line of the first sub-pixel 12 and the third sub-pixel 16a are parallel to each other. Specifically, as shown in Figures 3 and 7, the long axis direction of the second sub-pixel 14 is parallel to the first direction, the direction of the central connecting line between the first sub-pixel 12 and the third sub-pixel 16a is parallel to the second direction, and the first direction is perpendicular to the second direction. Thus, on the one hand, compared with sub-pixels of other shapes, the arrangement between the sub-pixels is closer, and the sub-pixels of the same color are independently arranged in a row, which can effectively improve the color edge phenomenon. On the other hand, the sub-pixels located on the irregular edge of the display panel are more in line with the design of the round corner, i.e., the slope of the sub-pixel is tangent to or coincides with the radian of the round corner, so that the edge of each sub-pixel can smoothly transition at the round corner, and the problem of the jagged edges at the round corner can be improved.

[0116] Preferably, the extension direction of the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a and the fourth sub-pixel 16b is parallel to the first direction, and the included angle with the row direction or the column direction is 30° to 60°. In this way, the inclination of the sub-pixel can be made to be tangent to or coincident with the radian of the round corner, so that the smooth transition of the edge of each sub-pixel at the round corner can be realized, and the problem of the jagged edges at the round corner can be further improved. It should be emphasized that while the human eye is sensitive to the screen quality in the horizontal or vertical direction, it is not very sensitive to the screen quality in the direction with the included angle of 45° with the horizontal direction. Therefore, in a preferred embodiment, the included angle between the first direction and the row direction is 45°, so that the overall display quality can be improved. As particularly pointed out, the force received by the mask plate is usually transmitted in the row or column direction, for example, the tensile force F is transmitted in the row direction, and the openings of the mask plate with corresponding subpixels inclined to the row or column direction can resolve the received force in the row and column directions, thereby avoiding the deformation of the openings due to the concentration of the tensile force F of the FMM, and reducing the difficulty of manufacturing and tensioning the mask plate. And since the openings of the mask plate are inclined, more openings can be provided in a mask plate of the same length and width, reducing the manufacturing cost of the mask.

[0117] Of course, the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b may have other shapes, and are not limited here. For example, as shown in Figures 3 and 7, the first sub-pixel 12 may be a square, and the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b may be a rectangle.

[0118] Here, the term "approximately rectangular" means that the shape of the sub-pixel may not be strictly rectangular but may be approximately rectangular due to process limitations or the convenience of manufacturing the mask plate, for example, a rounded rectangle or a corner-cut rectangle having rounded corners. Here, a rounded rectangle is a shape formed by rounding the apex corners of a rectangle, and a corner-cut rectangle is a shape formed by cutting off one or more apex corners of a rectangle. By making the shape of the sub-pixel approximate a rectangle, the aperture ratio of the sub-pixel can be adjusted more flexibly and the restrictive conditions in manufacturing the mask plate can be satisfied.

[0119] In the same pixel unit, the first subpixel 12 has a first long axis and a first short axis, the second subpixel 14 has a second long axis and a second short axis, the third subpixel 16a has a third long axis and a third short axis, and the fourth subpixel 16b has a fourth long axis and a fourth short axis. That is, each subpixel has a regular or irregular shape having a long axis and a short axis, for example, a rectangle or a shape close to a rectangle. Preferably, the third subpixel 16a and the fourth subpixel 16b are subpixels of the same color, for example, when both are green subpixels, the third long axis and the fourth long axis are parallel to each other and have the same length, and the third short axis and the fourth short axis are parallel to each other and have the same length. Furthermore, the ratio of the first long axis to the first short axis is 1.5 to 1, the ratio of the second long axis to the second short axis is 5 to 1, and the ratio of the third long axis to the third short axis is 5 to 1. For example, in the embodiment shown in Figures 3 and 4, the first sub-pixel 12 is a square, and the ratio of the first major axis to the first minor axis is 1, and the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 14b are all rectangular, and the ratio of the major axis to the minor axis of the second sub-pixel 14, the third sub-pixel 16a, and the fourth sub-pixel 16b is 5:1. In this way, under the premise of ensuring the aperture ratio as much as possible, the sub-pixels are offset correspondingly to reduce the color edge phenomenon as much as possible. In addition, the light-transmitting spare area Z with a large area can be formed between adjacent sub-pixels as much as possible, which contributes to expanding the light collection area of ​​the under-screen photosensitive device.

[0120] The length of the long axis of a subpixel is the maximum size of the light-emitting area of ​​the subpixel in the vertical extension direction, and the length of the short axis of a subpixel is the maximum size of the light-emitting area of ​​the subpixel in the width direction opposite to the vertical extension direction of the light-emitting area of ​​the subpixel.

[0121] The first long axis, the second long axis, the third long axis, and the fourth long axis are parallel to each other in pairs. Specifically, in the long axis direction of the subpixel, the first subpixel 12, the second subpixel 14, the third subpixel 16a, and the fourth subpixel 16b each have a pair of opposite sides, and the pairs of opposite sides are parallel to each other. In the short axis direction of the subpixel, the first subpixel 12, the second subpixel 14, the third subpixel 16a, and the fourth subpixel 16b each have another pair of opposite sides, and the other pairs of opposite sides are parallel to each other. For example, in the embodiment shown in FIG. 3 and FIG. 7, the shape of the first subpixel 12 is a square, the shape of the second subpixel 14, the third subpixel 16a, and the fourth subpixel 16b are a rectangle, the ratio of the length of the first long axis and the first short axis of the first subpixel 12 is 1, and the first long axis, the second long axis, the third long axis, and the fourth long axis are parallel to each other in pairs. The first sub-pixel 12 has a first side and a second side facing the third sub-pixel 16a and the fourth sub-pixel 16b, respectively, a third side adjacent to the first side and facing the second side, and a fourth side facing the first side and adjacent to the second and third sides. Here, the first side and the fourth side of the first sub-pixel 12 are parallel to the long side of the second sub-pixel 14, and the long sides of the third sub-pixel 16a and the fourth sub-pixel 16b are parallel to each other. In this way, the sub-pixels are uniformly arranged, further improving the display quality.

[0122] In a pixel unit, an extension line of one side of the first sub-pixel 12 close to an edge of the pixel unit overlaps with an extension line of one short side of the third sub-pixel 16a close to the edge of the pixel unit on the same side. An extension line of the other side of the first sub-pixel 12 close to the edge of the pixel unit overlaps with an extension line of a long side of the fourth sub-pixel 16b close to the edge of the pixel unit on the same side. In a specific embodiment, in one pixel unit, the third side of the first sub-pixel 12 is collinear with the short side of the third sub-pixel 16a, and the fourth side of the first sub-pixel 12 is collinear with the long side of the fourth sub-pixel 16b. In this way, the first pixel unit has a regular shape, and the arrangement of the sub-pixels is more compact and uniform. Furthermore, in some embodiments, the extension line of the second side of the first sub-pixel 12 is offset from the third sub-pixel 16a, and the extension line of the first side is offset from the fourth sub-pixel 16b. In this way, the degree of misalignment between sub-pixels is guaranteed, and the protruding degree of the sub-pixels at the display edge is weakened, thereby effectively improving the color edge problem at the display edge.

[0123] Furthermore, in some embodiments, the length of the long side of the first sub-pixel 12, the third sub-pixel 16a and the fourth sub-pixel 16b may be the same as the length of the side of the second sub-pixel 14. In this way, the first pixel unit further exhibits a regular shape, making the arrangement of the sub-pixels more compact and uniform.

[0124] An extension line of at least one of the two long sides of the second subpixel 14 passes through the gap between the first subpixel 12 and the third subpixel 16a. Furthermore, an extension line of one long side of the second subpixel 14 passes through the gap between the first subpixel 12 and the third subpixel 16a, and an extension line of the other long side of the second subpixel 14 overlaps with the side of the first subpixel 12 close to the third subpixel 16a. For example, an extension line of one long side of the second subpixel 14 may pass between the first subpixel 12 and the third subpixel 16a. An extension line of the other long side of the second subpixel 14 is collinear with the first side of the first subpixel 12. In this way, the size of the light-transmitting spare area Z is guaranteed as much as possible on the premise that the subpixel arrangement is uniform, which contributes to realizing, for example, a screen-under-imaging function. Of course, in some other embodiments, both extension lines of the two long sides of the second subpixel 14 pass through the gap between the first subpixel 12 and the third subpixel 16a. In other words, when the second sub-pixel 14 is translated in the first direction, it can pass between the first sub-pixel 12 and the third sub-pixel 16a.

[0125] The central connecting lines of the third sub-pixels 16a located in the same row and / or column are non-linear or approximately linear, and the central connecting lines of the fourth sub-pixels in the same row and / or column are non-linear or approximately linear. For example, the central connecting lines of the green sub-pixels located in the same row and / or column may be jagged, as shown in Figures 7 and 8. In this way, on the one hand, the protruding degree of the sub-pixels is weakened and the color edge is improved, and on the other hand, the green sub-pixels in the adjacent pixel groups are prevented from being too close to each other, and the situation in which the two adjacent green sub-pixels are difficult to distinguish due to the close distance between the adjacent green sub-pixels and are visually perceived as one by the human eye can be further avoided.

[0126] As can be appreciated, in some embodiments, the central connecting line of the first sub-pixels 12 in the same row and / or column may be a straight line, and the central connecting line of the second sub-pixels 14 in the same row and / or column may be a straight line, in this way, the arrangement of the sub-pixels can be made more uniform, which contributes to improving the display quality.

[0127] Furthermore, the major axis directions of the third sub-pixel 16a and the fourth sub-pixel 16b arranged in the same row and adjacent to each other in the first and second directions are different. For example, as shown in FIG. 4, the first and second directions are oblique to the horizontal row direction and the vertical column direction, and the major axis directions of the two second sub-pixels R1 and R2 arranged in the same row and adjacent to each other in the first and second directions are opposite to each other. Correspondingly, the major axis directions of the third sub-pixel 16a and the fourth sub-pixel 16b arranged in the first and second directions and adjacent to each other are also different. In this way, on the one hand, the sub-pixels are arranged as closely as possible, and at the same time, the offset arrangement of the sub-pixels is deepened, and color shift is effectively improved. On the other hand, graininess caused by the distance between the sub-pixels of the same color being too close to each other and being recognized as one by the human eye is avoided.

[0128] The center of the third subpixel 16a or the center of the fourth subpixel 16b in the first pixel unit is located outside the center connecting line between the center of the second subpixel 14 in the first pixel unit and the center of the second subpixel 14 in the second pixel unit adjacent to the first pixel unit. In other words, the center of the third subpixel 16a or the center of the fourth subpixel 16b in one pixel unit is located outside the extension line of the connecting line between the center of the second subpixel 14 in the pixel unit in which it is located and the center of the second subpixel 14 in another adjacent pixel unit. For example, specifically, in some embodiments, as shown in Figures 7 and 8, the extension line of the connecting line between the center of the second subpixel R1 in the first pixel unit and the center of the second subpixel R2 in the second pixel unit adjacent to the first pixel unit is shifted from the centers of the third subpixel G11 and the fourth subpixel G12 in the first pixel unit, and the centers of the third subpixel G11 and the fourth subpixel G12 are located on both sides of the extension line of the connecting line. In addition, the center of the subpixel being located outside the central connecting line means that the center of the subpixel and the central connecting line are offset from each other, for example, the center of the subpixel is located on one side of the central connecting line.

[0129] In the same pixel unit, the minimum distance between two adjacent sub-pixels in the first direction and the second direction is nThen, in the first direction and the second direction, the minimum distance between the sub-pixels of different colors that are closest to each other in two adjacent pixel units is also n. Here, 10 μm < n < 30 μm. In this way, on the one hand, the arrangement of the sub-pixels is made more uniform, contributing to the improvement of the display quality. On the other hand, it is possible to effectively avoid the jagged shape caused by crosstalk or interference of light emission between adjacent sub-pixels. Note that the display panel provided in the embodiment of the present invention may be an organic light-emitting display panel. The sub-pixel includes at least an anode, a cathode, and a light-emitting layer located between the anode and the cathode. A voltage is applied between the anode and the cathode by a driving circuit to excite the transition of carriers, which acts on the light-emitting layer to emit light rays. In order to avoid crosstalk or interference between adjacent sub-pixels, the display panel may further include a pixel definition layer. The pixel definition layer defines a plurality of pixel openings, and the light-emitting layer of the sub-pixel is provided in the pixel opening. Therefore, the area of the pixel opening is the light-emitting area of the sub-pixel. However, since it is limited to the evaporation technique, in order to ensure that the light-emitting material is completely evaporated within the pixel opening, usually, in order to leave an evaporation margin, the area of the opening of the mask plate is made larger than the area of the pixel opening. For example, as shown in FIG. 7, the inner side of the sub-pixel is called the pixel side, that is, the boundary of the pixel opening of the pixel definition layer (PDL layer), and the outer side is called the virtual side of the sub-pixel. The virtual side is the boundary of the evaporation opening of the mask (mask plate). Therefore, in the embodiment of the present invention, the distance between sub-pixels is the distance between the pixel sides of two sub-pixels. Specifically, in the embodiments shown in FIGS. 3 and 7, when two adjacent sub-pixels have two pixel sides that are adjacent to each other and parallel, the minimum distance between the two adjacent sub-pixels is the vertical distance between the two adjacent and parallel pixel sides.

[0130] Furthermore, assuming that the minimum distance between the second sub-pixel R1 in the first pixel unit and the third sub-pixel G21 of the second pixel unit arranged adjacent in the second direction is p, then n < p < 3n. Alternatively, assuming that the minimum distance between the second sub-pixel R2 in the second pixel unit and the third sub-pixel G11 of the first pixel unit arranged adjacent in the first direction is q, then n < q < 3n. In this way, a sufficiently large light transmission reserve area Z can be guaranteed, and furthermore, the light amount necessary for the normal operation of the photosensitive device under the screen can be satisfied.

[0131] Connect the centers of four adjacent third sub-pixels and fourth sub-pixels to form a virtual quadrilateral, and the minimum interior angle γ of the virtual quadrilateral is greater than 60° and less than 90°. In this way, on the one hand, by controlling the minimum angle, the distance between four adjacent third sub-pixels and fourth sub-pixels is restricted, avoiding the situation where the distance is too large and the display becomes uneven. On the other hand, the green sub-pixels in adjacent pixel groups are prevented from getting too close, further avoiding the situation where two adjacent green sub-pixels are difficult to distinguish due to their close distance and are visually regarded as one by the human eye.

[0132] The center connection line of the third sub-pixels located in the same row and / or column is non-linear or approximately linear, and / or the center connection line of the fourth sub-pixels in the same row and / or column is non-linear or approximately linear. For example, as shown in FIG. 6, the center connection line of the green sub-pixels located in the same row and / or column presents a zigzag shape. In this way, on the one hand, the protrusion degree of the sub-pixels is weakened and the color edge is improved. On the other hand, the green sub-pixels in adjacent pixel groups are prevented from getting too close, further avoiding the situation where two adjacent green sub-pixels are difficult to distinguish due to their close distance and are visually regarded as one by the human eye.

[0133] The centers of the red sub-pixels are not aligned in a straight line in the first direction and the second direction, or the centers of the green sub-pixels are not aligned in a straight line in the first direction and the second direction, or the centers of the blue sub-pixels are not aligned in a straight line in the first direction and the second direction, thereby ensuring the offset arrangement between the sub-pixels and effectively improving the color edge phenomenon.

[0134] As will be appreciated, in some embodiments, the central connecting line of the first sub-image pixels of the same row and / or column may be a straight line, and the central connecting line of the second sub-pixels of the same row and / or column may be a straight line, but is not limited thereto.

[0135] A fifth virtual rectangle is formed by connecting the centers of two green subpixels in one pixel group in any one of the odd-numbered rows or columns with the centers of the two most adjacent green subpixels in the adjacent pixel group in the even-numbered row or column, and the minimum interior angle γ of the fifth virtual rectangle is ≧60°. In this way, the situation in which the two adjacent green subpixels are difficult to distinguish due to their close distance and are visually confused by the human eye is further avoided.

[0136] The present invention provides the following embodiments. Embodiment 17: A pixel array structure including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, wherein a virtual rectangle is formed by connecting the centers of two aligned first sub-pixels and the centers of two aligned second sub-pixels as vertices, the virtual rectangle has two equal sides arranged opposite to each other, and short and long sides connecting the vertices of the equal sides arranged opposite to each other, the short sides of the virtual rectangle and the long sides of the virtual rectangle are not parallel to each other, one third sub-pixel or one fourth sub-pixel is arranged within the virtual rectangle, and the third sub-pixel and the fourth sub-pixel emit light of the same color. Embodiment 18: The pixel array structure of embodiment 17, wherein the pixel array structure includes a plurality of virtual rectangles, the plurality of virtual rectangles including a first virtual rectangle and a second virtual rectangle that are adjacent to each other and share a side, one of the third sub-pixels being provided within the first virtual rectangle, and one of the fourth sub-pixels being provided within the second virtual rectangle. Embodiment 19: A pixel array structure described in embodiment 18, wherein in the first virtual rectangle and the adjacent second virtual rectangle, the sum of the four interior angles with the center of the first sub-pixel as a vertex is equal to 360°, and the sum of the four interior angles with the center of the second sub-pixel as a vertex is equal to 360°. Embodiment 20: A pixel array structure as described in embodiment 18, wherein the length of a first equal-length opposite side of the first imaginary rectangle is not equal to the length of a second equal-length opposite side of the second imaginary rectangle, the length of a short side of the first imaginary rectangle is equal to the length of a short side of the second imaginary rectangle, and the length of a long side of the first imaginary rectangle is equal to the length of the long side of the second imaginary rectangle. Embodiment 21: A pixel array structure according to embodiment 20, wherein the first virtual rectangle and the adjacent second virtual rectangle share a short side or a long side in the column direction. Embodiment 22: A pixel array structure described in embodiment 20, wherein in the row direction, the first virtual rectangle and an adjacent inverted first virtual rectangle share a first equal length opposite side as a shared side, and the second virtual rectangle and an adjacent inverted second virtual rectangle share a second equal length opposite side as a shared side. Embodiment 23: The pixel array structure described in embodiment 18, wherein the pixel array structure includes a virtual polygon formed by arranging four virtual rectangles with their sides shared, and the four virtual rectangles specifically include a first virtual rectangle, a second virtual rectangle, a virtual rectangle obtained by inverting the first virtual rectangle, and a virtual rectangle obtained by inverting the second virtual rectangle. Embodiment 24: A pixel array structure described in embodiment 23, wherein the first virtual rectangle shares a first equal length opposite side with a virtual rectangle obtained by inverting the first virtual rectangle in the row direction and shares a short side with a second virtual rectangle in the column direction, the virtual rectangle obtained by inverting the first virtual rectangle shares a long side with a virtual rectangle obtained by inverting the second virtual rectangle in the column direction, and the virtual rectangle obtained by inverting the second virtual rectangle in the row direction shares a second equal length opposite side with the second virtual rectangle. Embodiment 25: A pixel array structure described in embodiment 24, in which the length of the first equal length opposite side is equal to the length of the second equal length opposite side, the second subpixel is located at the first vertex of each virtual rectangle, the first subpixel is located at the second vertex of each virtual rectangle, the first vertex and the second vertex are alternately arranged and isolated from each other, and the third subpixel or the fourth subpixel is located within each virtual rectangle. Embodiment 26: A pixel arrangement structure described in embodiment 18, wherein within the virtual rectangle, a connecting line connecting the centers of two of the first subpixels is a first diagonal line, a connecting line connecting the centers of two of the second subpixels is a second diagonal line, and within the virtual rectangle, the centers of the third subpixel and / or the fourth subpixel are shifted from the second diagonal line. Embodiment 27: The pixel array structure of embodiment 18, wherein the pixel array structure includes a first pixel unit and a second pixel unit, each of the first pixel unit and the second pixel unit includes a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, and the first pixel unit and the second pixel unit are arranged alternately in the first direction and the second direction. Embodiment 28: A pixel array structure as described in embodiment 17, wherein the vertices of the virtual rectangle are respectively located at the centers of the first subpixel, the center of the second subpixel in the first pixel unit, and the centers of the first subpixel or the second subpixel in two second pixel units adjacent to the first pixel unit, or the vertices of the virtual rectangle are respectively located at the centers of the first subpixel, the center of the second subpixel in the second pixel unit, and the centers of the first subpixel or the second subpixel in two first pixel units adjacent to the second pixel unit. Embodiment 29: The pixel array structure of embodiment 17, wherein the third sub-pixel and the fourth sub-pixel are both green light-emitting sub-pixels, the first sub-pixel is a blue light-emitting sub-pixel, and the second sub-pixel is a red light-emitting sub-pixel. Embodiment 30: The pixel array structure of embodiment 17, wherein each sub-pixel structure of the second pixel unit and each sub-pixel structure of the first pixel unit are the same, or each sub-pixel structure of the second pixel unit is mirror-symmetric to each sub-pixel structure of the first pixel unit after rotating by a predetermined angle, and the predetermined angle is greater than 0° and less than 360°. Embodiment 31: The pixel array structure of embodiment 30, wherein the predetermined angle is 90°. Embodiment 32: A pixel array structure according to embodiment 17, wherein each subpixel is a regular or irregular shape having a major axis and a minor axis, the first subpixel has a first major axis and a first minor axis, the second subpixel has a second major axis and a second minor axis, the third subpixel has a third major axis and a third minor axis, and the fourth subpixel has a fourth major axis and a fourth minor axis, the shape of the subpixel is selected from the group consisting of an ellipse, a circle, a sector, a dumbbell, a pear, a square, a polygon, a shape close to a rectangle, a rounded rectangle, a star, and a hard shape, and in the first pixel unit, the second major axis, the third major axis, and the fourth major axis are parallel to each other, a ratio between the first major axis and the first minor axis is 1.5 to 1, a ratio between the second major axis and the second minor axis is 5 to 1, a ratio between the third major axis and the third minor axis is 5 to 1, and a ratio between the fourth major axis and the fourth minor axis is 5 to 1. Embodiment 33: A pixel array structure as described in embodiment 17, in which in the row direction, the connecting lines connecting the centers of the first subpixels in each row are straight lines, the connecting lines connecting the centers of the second subpixels in each row are straight lines, and the connecting lines connecting the centers of the third subpixels or fourth subpixels in each row are non-straight lines or approximately straight lines. Embodiment 34: A pixel array structure as described in embodiment 17, in which the centers of the red subpixels are not aligned in a straight line in the first and second directions, or the centers of the green subpixels are not aligned in a straight line in the first and second directions, or the centers of the blue subpixels are not aligned in a straight line in the first and second directions. In a third aspect of the present invention, there is further provided a display panel including the pixel array structure in the above embodiment.

[0137] Based on the same inventive idea, the present invention further provides a mask plate for fabricating the pixel array structure provided in the embodiment of the present invention, the mask plate including a plurality of opening areas corresponding to the shapes and positions of the first sub-pixel 12, the second sub-pixel 14, the third sub-pixel 16a or the fourth sub-pixel 16b.

[0138] Based on the same inventive idea, the present invention further provides a display device including the display panel 100 in the embodiment of each of the above aspects.

[0139] Specifically, the display device can be applied to the fields of mobile phone terminals, bionic electronics, electronic skin, wearable devices, in-vehicle devices, IoT devices, artificial intelligence devices, etc. For example, the display device may be a digital device such as a mobile phone, a tablet, a PDA, an iPod, or a smart watch.

[0140] The technical features of the above embodiments can be combined in any combination, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but as long as there is no contradiction in the combinations of these technical features, they should all be considered to be within the scope described in this specification.

[0141] The above examples only show some embodiments of the present invention, and the description is specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be noted that those skilled in the art can make some modifications and improvements without departing from the concept of the present invention, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of the attached claims.

Claims

1. A pixel array structure including a plurality of first pixel units and a plurality of second pixel units, the plurality of first pixel units and the plurality of second pixel units being alternately arranged in a first direction and a second direction; Each of the first pixel unit and the second pixel unit includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the first sub-pixel is located on one side of a connecting line connecting a center of the third sub-pixel and a center of the fourth sub-pixel, and the second sub-pixel is located on the other side of the connecting line connecting a center of the third sub-pixel and a center of the fourth sub-pixel, the sub-pixel array structure of the second pixel unit rotated by a predetermined angle is mirror-symmetric with the sub-pixel array structure of the first pixel unit; The predetermined angle is 90°. the second sub-pixel, the third sub-pixel, and the fourth sub-pixel have a rectangular shape or a rectangular shape with rounded corners, and a long side of the second sub-pixel, a long side of the third sub-pixel, and a long side of the fourth sub-pixel are parallel to each other, In the first pixel unit, an extension line of one side of the first sub-pixel close to an edge of the first pixel unit overlaps with an extension line of one short side of the third sub-pixel close to the same edge of the first pixel unit; an extension line of the other side of the first sub-pixel that is close to the edge of the first pixel unit and an extension line of one long side of the fourth sub-pixel that is close to the same edge of the first pixel unit overlap with each other; a pixel array structure in which extensions of two long sides of the second sub-pixel both pass through the gap between the first sub-pixel and the third sub-pixel;

2. a length of a connecting line connecting a center of the second sub-pixel and a center of the third sub-pixel in the first pixel unit is not equal to a length of a connecting line connecting a center of the second sub-pixel and a center of the fourth sub-pixel in the first pixel unit; 2. The pixel array structure of claim 1, wherein a length of a connecting line connecting a center of the second sub-pixel and a center of the third sub-pixel in the second pixel unit is not equal to a length of a connecting line connecting a center of the second sub-pixel and a center of the fourth sub-pixel in the second pixel unit.

3. Two of the first pixel units and two of the second pixel units adjacent to each other constitute an overlapping unit, and the overlapping units are arranged along a first direction and a second direction; The pixel array structure according to claim 1 , wherein in each overlapping unit, two of the second pixel units are located on both sides of a connecting line connecting the geometric centers of two of the first pixel units.

4. In one of the overlapping units, in any one of the second pixel units and the first pixel unit adjacent thereto in a first direction, a length of a connecting line connecting a center of the second sub-pixel in the second pixel unit to a center of the third sub-pixel in the second pixel unit is L1, and a length of a connecting line connecting a center of the second sub-pixel in the first pixel unit to a center of the third sub-pixel in the second pixel unit is L2, L1 is not equal to L2, 4. The pixel array structure of claim 3, wherein in the second pixel unit and another first pixel unit adjacent thereto in the second direction, a length of a connecting line connecting a center of the second sub-pixel in the second pixel unit to a center of the fourth sub-pixel in the other first pixel unit is L3, and a length of a connecting line connecting a center of the second sub-pixel to a center of the fourth sub-pixel in the other first pixel unit is L4, L3 is not equal to L4.

5. in one of the overlapping units, in any one of the second pixel units and the first pixel unit adjacent thereto in a first direction, a connecting line connecting centers of the second sub-pixel, the third sub-pixel, and the second sub-pixel in the second pixel unit forms a scalene triangle; and in the second pixel unit and another first pixel unit adjacent thereto in the second direction, a connecting line connecting the centers of the second sub-pixel, the fourth sub-pixel, and the second sub-pixel in the other first pixel unit forms a scalene triangle.

6. 4. The pixel array structure of claim 3, wherein in one overlap unit, a connecting line connecting the centers of any two of the second subpixels does not overlap with a connecting line connecting the center of any one of the second subpixels and the center of the third subpixel, and a connecting line connecting the centers of any two of the second subpixels does not overlap with a connecting line connecting the center of any one of the second subpixels and the center of the fourth subpixel.

7. 4. The pixel array structure of claim 3, wherein in one overlapping unit, first virtual connecting lines passing through the centers of the first sub-pixel and the third sub-pixel in two of the first pixel units are parallel to each other, and second virtual connecting lines passing through the centers of the first sub-pixel and the fourth sub-pixel in two of the second pixel units are parallel to each other, and the first virtual connecting lines and the second virtual connecting lines do not overlap.

8. 4. The pixel array structure of claim 3, in one of the overlapping units, an extension of a connecting line connecting a center of the first subpixel and a center of the second subpixel in one of the first pixel units does not overlap with an extension of a connecting line connecting a center of the first subpixel and a center of the second subpixel in another of the first pixel units, an extension of a connecting line connecting a center of the first subpixel and a center of the second subpixel in one of the second pixel units does not overlap with an extension of a connecting line connecting a center of the first subpixel and a center of the second subpixel in another of the second pixel units, and an extension of a connecting line connecting a center of the first subpixel and a center of the second subpixel in any one of the first pixel units does not overlap with an extension of a connecting line connecting a center of the first subpixel and a center of the second subpixel in any one of the second pixel units.

9. 4. The pixel array structure of claim 3, wherein in one overlapping unit, in two of the first pixel units, a third virtual connecting line passing through a center of the second sub-pixel and a center of the third sub-pixel are parallel to each other, and in two of the second pixel units, a fourth virtual connecting line passing through a center of the second sub-pixel and a center of the fourth sub-pixel are parallel to each other, and an extension line of the third virtual connecting line and an extension line of the fourth virtual connecting line do not overlap with each other.

10. 4. The pixel array structure of claim 3, wherein in the first pixel unit and the second pixel unit adjacent to each other in the first direction, a distance between the second sub-pixel in the first pixel unit and the fourth sub-pixel in the second pixel unit is greater than a distance between the third sub-pixel in the first pixel unit and the second sub-pixel, and a distance between the second sub-pixel in the first pixel unit and the fourth sub-pixel in the second pixel unit is greater than a distance between the fourth sub-pixel in the first pixel unit and the second sub-pixel.

11. The color of the first sub-pixel is blue, the color of the second sub-pixel is red, and the color of the third sub-pixel is green; The first sub-pixel has a square shape, a light-emitting area of ​​the first sub-pixel is larger than a light-emitting area of ​​the second sub-pixel, and the light-emitting area of ​​the second sub-pixel is equal to or larger than a light-emitting area of ​​the third sub-pixel or the fourth sub-pixel; The third sub-pixel and the fourth sub-pixel have the same light-emitting area, The pixel array structure according to claim 1 , wherein the lengths of longer sides of the second sub-pixel, the third sub-pixel and the fourth sub-pixel are equal to a length of a side of the first sub-pixel.

12. The pixel array structure as claimed in claim 11 , wherein the second sub-pixel, the third sub-pixel and the fourth sub-pixel have the same light-emitting area.

13. The pixel array structure according to claim 11 , wherein a long side of the second sub-pixel is parallel to a pair of opposing sides of the first sub-pixel, a long side of the third sub-pixel, and a long side of the fourth sub-pixel.

14. In the same pixel unit, when a minimum distance between two adjacent sub-pixels in the first direction and the second direction is n, the minimum distance between the most adjacent sub-pixels of different colors in the two adjacent pixel units is also n; 2. The pixel arrangement structure of claim 1, wherein p is a minimum distance between the second sub-pixel in the first pixel unit and the third sub-pixel of the second pixel unit arranged adjacent to the first pixel unit in the second direction, n<p<3n, and q is a minimum distance between the second sub-pixel in the second pixel unit and the third sub-pixel of the first pixel unit arranged adjacent to the first direction, n<q<3n.

15. A display panel comprising the pixel array structure according to any one of claims 1 to 14.

16. A display device comprising the display panel according to claim 15.

Images