Pixel arrangement structure and display panel applying same

Abstract

The utility model relates to a pixel arrangement structure and a display panel applying the same, the pixel arrangement structure comprises a plurality of pixel units which are closely arranged along the row direction and the column direction, each pixel unit is square and comprises a first sub-pixel, a second sub-pixel, a third sub-pixel, a fourth sub-pixel, a fourth sub-pixel, a fifth sub-pixel and a sixth sub-pixel, the two groups of second sub-pixels are symmetrically arranged at the first opposite angles of the square relative to the first sub-pixels; the two groups of third sub-pixels are symmetrically arranged at the second opposite angles of the square relative to the first sub-pixels; the light-transmitting part is formed at the square corner part corresponding to the third sub-pixel; the first sub-pixels, the second sub-pixels and the third sub-pixels are different in color, and the light-transmitting parts of every two adjacent pixel units are spliced together to form a light-transmitting area. The light-transmitting parts of the adjacent pixel units are spliced together to form a large-area light-transmitting area, light can pass through the light-transmitting area easily, and the light transmittance and the light-transmitting uniformity are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of displays, and in particular to a pixel arrangement structure and a display panel using the structure. Background Art

[0002] Organic light-emitting diodes (OLEDs) have been widely used in the display industry due to their advantages such as self-luminescence, low driving voltage, high efficiency, high definition, and flexible display.

[0003] For example, "Display Panel and Electronic Device Including the Display Panel" (Publication No.: CN118695742A) with application number CN202410207771.1 discloses a solution, wherein the display panel includes: a substrate; a pixel layer arranged on the substrate, including a first display element, a second display element, and a third display element emitting light of different colors; a packaging component sealing the pixel layer on the pixel layer; a first refractive layer arranged on the packaging component, including a first opening overlapping with the second display element; a second refractive layer arranged to cover the first refractive layer and having a refractive index different from that of the first refractive layer, wherein the distance between the upper surface of the substrate and the lower surface of the second refractive layer in the region overlapping with the second display element is smaller than the distance between the upper surface of the substrate and the lower surface of the second refractive layer in the region overlapping with the third display element.

[0004] The display effect of the display panel is greatly affected by the above-mentioned pixel layer structure. However, the pixel arrangement structure of the existing display panel is limited by the arrangement form and size. It is difficult to ensure high resolution while ensuring transmittance, which greatly affects the display effect of the display panel.

[0005] Therefore, further improvements are needed for the current pixel arrangement structure of the pixel layer and the corresponding display panel. Utility Model Content

[0006] The first technical problem to be solved by the present invention is to provide a pixel arrangement structure that takes into account both high resolution and high transmittance in view of the current status of the existing technology.

[0007] The second technical problem to be solved by the present invention is to provide a display panel having the above-mentioned pixel arrangement structure in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve at least one of the above technical problems is:

[0009] A pixel arrangement structure includes a plurality of pixel units closely arranged in row and column directions, each of the pixel units being square and comprising:

[0010] A first sub-pixel is located in the center of the pixel unit;

[0011] Two groups of second sub-pixels are symmetrically arranged at first opposite corners of a square relative to the first sub-pixels;

[0012] Two third sub-pixels are arranged in groups symmetrically at the second diagonal corners of the square relative to the first sub-pixels;

[0013] a light-transmitting portion formed at a corner of the square corresponding to the third sub-pixel;

[0014] The colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel are different from each other, and the light-transmitting portions of two adjacent pixel units are spliced together to form a light-transmitting area.

[0015] In the present invention, adjacent sub-pixels at the junction of two adjacent pixel units along the row and column directions have the same color. With this structure, during the vapor deposition process, two adjacent sub-pixels can be simultaneously vapor-deposited through a single mask opening, facilitating production.

[0016] Preferably, the first sub-pixel is a regular hexagon, with two straight sides of the regular hexagon corresponding to the first diagonal corners of the square, and two adjacent sides of the regular hexagon forming a pyramidal structure with their tips corresponding to the second diagonal corners of the square. The second sub-pixel is arranged close to the straight side of the regular hexagon at the first diagonal corner of the square, and the third sub-pixel is arranged around the pyramidal structure of the regular hexagon at the second diagonal corner of the square. This structure facilitates increasing the compactness of the sub-pixel arrangement in the pixel structure.

[0017] Further preferably, the second sub-pixel is pentagonal, and the third sub-pixel is composed of two quadrilateral portions, each of which is close to the pyramidal structure. A square or diamond-shaped light-transmitting portion is sandwiched between the two quadrilateral portions, and the two quadrilateral portions are arranged symmetrically about the diagonal of the square passing through the light-transmitting portion. With this structure, the hypotenuse of the first sub-pixel is opposite the hypotenuse of the second sub-pixel, and the hypotenuse of the first sub-pixel is opposite the hypotenuse of the third sub-pixel. This facilitates a denser arrangement of the sub-pixels in the pixel structure, enabling the arrangement of a larger number of sub-pixels within a given layout area, thereby improving the pixel density and resolution of the pixel structure.

[0018] Preferably, in one of the pixel units, the area ratio of the first sub-pixel, the second sub-pixel, and the third sub-pixel is (1.8-2.2):(1.2-1.7):1. Further preferably, in one of the pixel units, the area ratio of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 2:1.5:1. By controlling the above-mentioned area ratio and combining the decay rates of different color pixel materials, the overall decay rate of the display module / display device tends to be consistent, which can effectively reduce the color shift caused by inconsistent RGB efficiency and lifespan, and is conducive to extending the life of the display panel.

[0019] Preferably, the pixel units include four groups, namely, a first pixel unit, a second pixel unit, a third pixel unit, and a fourth pixel unit. The first pixel unit, the second pixel unit, the third pixel unit, and the fourth pixel unit are mirror-symmetrical in the column direction; the first pixel unit, the third pixel unit, and the second pixel unit and the fourth pixel unit are mirror-symmetrical in the row direction. With the above structure, the pixel units are regularly arranged in the horizontal and vertical directions, and the multiple light-transmitting areas are evenly distributed throughout the pixel structure, thereby allowing light to pass evenly through the display panel.

[0020] Preferably, for any two adjacent pixel units, the second sub-pixel in the first pixel unit is adjacent to the second sub-pixel in the second pixel unit, and the third sub-pixel in the first pixel unit is adjacent to the third sub-pixel in the second pixel unit. With the above structure, during the production vapor deposition process, two adjacent second sub-pixels or third sub-pixels can be simultaneously vapor-deposited through a single mask opening. Compared to the prior art arrangement of one mask opening corresponding to one sub-pixel, this reduces the mask opening density, simplifies the mask manufacturing process, and effectively reduces production costs. Furthermore, vapor deposition of two second sub-pixels or third sub-pixels in the same pixel group can ensure uniformity of the two second sub-pixels or third sub-pixels, thereby improving the stability of pixel display in the display panel.

[0021] A display panel, comprising:

[0022] substrate;

[0023] an anode layer, provided on the base substrate;

[0024] an organic layer, disposed on the anode layer;

[0025] a cathode layer, disposed on the organic layer;

[0026] an insulating layer, provided at an end of the organic layer to separate the anode layer from the cathode layer;

[0027] a refractive film layer, disposed on the cathode layer;

[0028] an encapsulation layer, disposed on the refractive film layer;

[0029] The invention also includes a pixel definition layer which passes through the organic layer and is arranged between the anode layer and the cathode layer. The pixel definition layer is applied with the above-mentioned pixel arrangement structure.

[0030] Preferably, the cross section of the pixel definition layer is a trapezoidal structure with a small upper end and a large lower end. The trapezoidal structure is arranged through the organic layer, the lower edge of the trapezoidal structure is arranged close to the upper surface of the anode layer, and the upper end of the trapezoidal structure is located in the cathode layer.

[0031] The insulating layer isolates the anode and cathode from contact, intercepting some of the leakage current within the device. The refractive film layer improves light extraction efficiency and is made from a combination of high- and low-refractive-index materials. The organic layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer. The specific materials used are known from the prior art and are not detailed here.

[0032] The display panel with the above structure has a more delicate display, can eliminate the problem of bright edges during display, and avoid sub-pixels with only one color in the edge part, which is beneficial to improving the display effect; the sub-light-transmitting areas in adjacent pixel units are connected to further form a large-area light-transmitting area, which is beneficial to the passage of light and improves the light transmittance and light uniformity of the display panel.

[0033] Compared with the existing technology, the advantages of the present invention are: the first sub-pixel, the second sub-pixel, and the third sub-pixel of the present invention are arranged in a symmetrical manner in the center and the corners, which can improve the uniformity and controllability of the pixel distribution in each area, and the colors of the three are different from each other, which can eliminate the bright edge problem at the edge during display and avoid the sub-pixels of only one color at the edge, thereby maintaining high resolution; at the same time, the translucent parts of adjacent pixel units are spliced together to form a large-area translucent area, which is conducive to the passage of light and improves the light transmittance and uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a pixel unit in an embodiment of the present utility model;

[0035] Figure 2 Schematic diagram of the pixel arrangement structure in an embodiment of the present invention (including four pixel units);

[0036] Figure 3 Schematic diagram of the pixel arrangement structure (including multiple pixel units) in an embodiment of the present invention;

[0037] Figure 4 Schematic diagram of the structure of the display panel in the embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0039] like Figures 1 to 3 As shown, the pixel arrangement structure of this embodiment includes a plurality of pixel units A closely arranged along the row direction X and the column direction Y. Each pixel unit A is square and includes:

[0040] The first sub-pixel 111 is located in the center of the pixel unit A;

[0041] The second sub-pixels 112 are divided into two groups and are symmetrically arranged at the first diagonal corners of the square relative to the first sub-pixels 111;

[0042] The third sub-pixels 113 are divided into two groups and are symmetrically arranged at the second diagonal corners of the square relative to the first sub-pixels 111;

[0043] The light-transmitting portion TA is formed at the corner of the square corresponding to the third sub-pixel 113;

[0044] The colors of the first sub-pixel 111 , the second sub-pixel 112 , and the third sub-pixel 113 are different from each other, and the light-transmitting portions TA of two adjacent pixel units A are spliced together to form a light-transmitting area.

[0045] In this embodiment, adjacent sub-pixels at the junction of two adjacent pixel units A along the row direction X and the column direction Y have the same color. With this structure, during the vapor deposition process, two adjacent sub-pixels can be simultaneously vapor-deposited through a single mask opening, facilitating production.

[0046] In this embodiment, the first subpixel 111 is a regular hexagon, with its two straight sides corresponding to the first diagonal corners of a square. Two adjacent sides of the regular hexagon form a pyramidal structure, with its tips corresponding to the second diagonal corners of the square. The second subpixel 112 is arranged close to the straight side of the regular hexagon at the first diagonal corner of the square, and the third subpixel is arranged around the pyramidal structure of the regular hexagon at the second diagonal corner of the square. This structure facilitates a denser arrangement of subpixels within the pixel structure.

[0047] In this embodiment, the second sub-pixel 112 is pentagonal, and the third sub-pixel 113 is composed of two quadrilateral portions, each of which is close to the pyramidal structure. A square or diamond-shaped light-transmitting portion TA is sandwiched between the two quadrilateral portions. The two quadrilateral portions are arranged symmetrically about the diagonal of the square passing through the light-transmitting portion TA. With this structure, the hypotenuse of the first sub-pixel 111 is opposite the hypotenuse of the second sub-pixel 112, and the hypotenuse of the first sub-pixel 111 is opposite the hypotenuse of the third sub-pixel 113. This facilitates a denser arrangement of sub-pixels within the pixel structure, enabling the arrangement of a larger number of sub-pixels within a given layout area, thereby improving the pixel density and resolution of the pixel structure.

[0048] In a pixel unit A, the area ratio of the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 is (1.8-2.2):(1.2-1.7):1, preferably 2:1.5:1. By controlling this area ratio and combining the decay rates of different color pixel materials, the overall decay rate of the display module / display device is made consistent, effectively reducing color shift caused by inconsistent RGB efficiency and lifespan, thereby extending the lifespan of the display panel.

[0049] like Figure 2 As shown, pixel units A include four groups, namely a first pixel unit 11, a second pixel unit 12, a third pixel unit 13, and a fourth pixel unit 14. The first pixel unit 11, the second pixel unit 12, the third pixel unit 13, and the fourth pixel unit 14 are mirror-symmetrical in the column direction Y; the first pixel unit 11, the third pixel unit 13, and the second pixel unit 12 and the fourth pixel unit 14 are mirror-symmetrical in the row direction X. With the above structure, the pixel units A are regularly arranged in the horizontal and vertical directions, and the multiple light-transmitting areas are evenly distributed throughout the pixel structure, allowing light to pass evenly through the display panel.

[0050] like Figure 3As shown, when there are multiple pixel units A and they are arranged together, for any two adjacent pixel units A, the second sub-pixel 112 in the first pixel unit A is adjacent to the second sub-pixel 112 in the second pixel unit A, and the third sub-pixel 113 in the first pixel unit A is adjacent to the third sub-pixel 113 in the second pixel unit A. With the above structure, during the production evaporation process, two adjacent second sub-pixels 112 or third sub-pixels 113 can be simultaneously deposited through a single mask opening. Compared to the prior art arrangement where one mask opening corresponds to one sub-pixel, this reduces the mask opening density, simplifies the mask manufacturing process, and effectively reduces production costs. Furthermore, when two second sub-pixels 112 or third sub-pixels 113 in the same pixel group are deposited, the uniformity of the two second sub-pixels 112 or third sub-pixels 113 can be ensured, thereby improving the stability of pixel display in the display panel.

[0051] In the pixel arrangement structure of this embodiment, the first sub-pixel 111, the second sub-pixel 112, and the third sub-pixel 113 are arranged in a symmetrical manner about the center and the corners, which can improve the uniformity and controllability of the pixel distribution in each area. In addition, the three sub-pixels have different colors, which can eliminate the bright edge problem during display and avoid sub-pixels of only one color at the edge, thereby maintaining high resolution. At the same time, the transparent portions TA of adjacent pixel units A are spliced together to form a large transparent area, which is conducive to the passage of light and improves light transmittance and uniformity.

[0052] like Figure 4 As shown, the display panel of this embodiment includes:

[0053] Base substrate 1;

[0054] an anode layer 2, provided on the base substrate 1;

[0055] an organic layer 3, provided on the anode layer 2;

[0056] a cathode layer 5 disposed on the organic layer 3;

[0057] The insulating layer 8 is provided at the end of the organic layer 3 to separate the anode layer 2 from the cathode layer 5;

[0058] a refractive film layer 6, provided on the cathode layer 5;

[0059] The encapsulation layer 7 is provided on the refractive film layer 6;

[0060] The structure further includes a pixel definition layer 4 that passes through the organic layer 3 and is disposed between the anode layer 2 and the cathode layer 5 . The pixel definition layer 4 applies the pixel arrangement structure of this embodiment.

[0061] The cross section of the pixel definition layer 4 is a trapezoidal structure with a small upper end and a large lower end. The trapezoidal structure is arranged through the organic layer 3, the lower edge of the trapezoidal structure is arranged close to the upper surface of the anode layer 2, and the upper end of the trapezoidal structure is located in the cathode layer 5.

[0062] The insulating layer 8 isolates the anode and cathode from contact, partially intercepting leakage current within the device. The refractive film layer 6 is used to improve light extraction efficiency and is made from a combination of high- and low-refractive-index materials. The organic layer 3 comprises a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer. The specific materials used are known in the art and are not detailed here.

[0063] The display panel with the above structure has a more delicate display, can eliminate the problem of bright edges during display, avoid sub-pixels with only one color in the edge part, and is beneficial to improving the display effect; the sub-light-transmitting areas in adjacent pixel units A are connected to further form a large-area light-transmitting area, which is beneficial to the passage of light and improves the light transmittance and light uniformity of the display panel.

[0064] In an organic electroluminescent device (OLED), a pixel definition layer 4 structure is designed on a display panel to form an array of pixel definition areas, and a light-emitting layer can be formed in the pixel opening area, ultimately forming the pixel definition layer and functional layer structure of the light-emitting device.

[0065] The pixel arrangement structure of this embodiment is applied to OLED display panels, which can improve the resolution, brightness, and lifespan of the display panels. The display panels of this embodiment are used in the display industry, such as mobile phones, tablet computers, televisions, monitors, laptop computers, digital cameras, car displays, navigation systems, and other products with display functions.

[0066] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A pixel arrangement structure comprising a plurality of pixel units (A) closely arranged along a row direction (X) and a column direction (Y), characterized in that: Each pixel unit (A) is square and includes A first sub-pixel (111) is located in the center of the pixel unit (A); Two second sub-pixels (112) are arranged symmetrically at first opposite corners of a square relative to the first sub-pixels (111); Two third sub-pixels (113) are arranged symmetrically at the second diagonal corners of the square relative to the first sub-pixels (111); a light-transmitting portion (TA) formed at a corner of the square corresponding to the third sub-pixel (113); The colors of the first sub-pixel (111), the second sub-pixel (112), and the third sub-pixel (113) are different from each other, and the light-transmitting portions (TA) of two adjacent pixel units (A) are spliced together to form a light-transmitting area.

2. The pixel arrangement structure according to claim 1, wherein: Along the row direction (X) and the column direction (Y), adjacent sub-pixels at the junction of two adjacent pixel units (A) have the same color.

3. The pixel arrangement structure according to claim 1, wherein: The first sub-pixel (111) is a regular hexagon, and the two straight sides of the regular hexagon are arranged corresponding to the first diagonal corners of the square respectively. The cone structure formed by the two adjacent sides of the regular hexagon has its tips corresponding to the second diagonal corners of the square respectively. The second sub-pixel (112) is arranged close to the straight side of the regular hexagon at the first diagonal corner of the square, and the third sub-pixel is arranged around the cone structure of the regular hexagon at the second diagonal corner of the square.

4. The pixel arrangement structure according to claim 3, wherein: The second sub-pixel (112) is a pentagon, and the third sub-pixel (113) is composed of two quadrilateral parts respectively close to the cone structure, a square or diamond-shaped light-transmitting part (TA) is sandwiched between the two quadrilateral parts, and the two quadrilateral parts are arranged in a central symmetric manner with respect to a diagonal line of the square passing through the light-transmitting part (TA).

5. The pixel arrangement structure according to claim 1, wherein: In one of the pixel units (A), the ratio of the areas of the first sub-pixel (111), the second sub-pixel (112), and the third sub-pixel (113) is (1.8-2.2):(1.2-1.7):

1.

6. The pixel arrangement structure according to claim 5, wherein: In one of the pixel units (A), the area ratio of the first sub-pixel (111), the second sub-pixel (112), and the third sub-pixel (113) is 2:1.5:

1.

7. The pixel arrangement structure according to any one of claims 1 to 6, wherein: The pixel unit (A) comprises four groups, namely a first pixel unit (11), a second pixel unit (12), a third pixel unit (13), and a fourth pixel unit (14); the first pixel unit (11), the second pixel unit (12), the third pixel unit (13), and the fourth pixel unit (14) are mirror-symmetrical in the column direction (Y); and the first pixel unit (11), the third pixel unit (13), the second pixel unit (12), and the fourth pixel unit (14) are mirror-symmetrical in the row direction (X).

8. The pixel arrangement structure according to any one of claims 1 to 6, wherein: For any two adjacent pixel units (A), the second sub-pixel (112) in the first pixel unit (A) is adjacent to the second sub-pixel (112) in the second pixel unit (A), and the third sub-pixel (113) in the first pixel unit (A) is adjacent to the third sub-pixel (113) in the second pixel unit (A).

9. A display panel comprising: a substrate base (1); an anode layer (2) provided on the base substrate (1); an organic layer (3) disposed on the anode layer (2); a cathode layer (5), disposed on the organic layer (3); an insulating layer (8) provided at an end of the organic layer (3) to separate the anode layer (2) from the cathode layer (5); a refractive film layer (6) disposed on the cathode layer (5); an encapsulation layer (7) disposed on the refractive film layer (6); The invention is characterized in that it further comprises a pixel definition layer (4) passing through the organic layer (3) and arranged between the anode layer (2) and the cathode layer (5), and the pixel definition layer (4) is applied with the pixel arrangement structure according to any one of claims 1 to 8.

10. The display panel according to claim 9, wherein: The cross section of the pixel definition layer (4) is a trapezoidal structure with a small upper end and a large lower end. The trapezoidal structure is arranged through the organic layer (3), the lower edge of the trapezoidal structure is arranged close to the upper surface of the anode layer (2), and the upper end of the trapezoidal structure is located in the cathode layer (5).

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