OLED pixel structure and OLED display screen

Abstract

The utility model discloses an OLED pixel structure and an OLED display screen, and relates to the display screen field, the OLED pixel structure comprises pixel units arranged and distributed in a matrix, the pixel units comprise a first pixel unit and a second pixel unit, each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel, the first pixel units and the second pixel units are distributed in the matrix in a staggered mode, the light-emitting area of first sub-pixels in the first pixel units is the same as the light-emitting area of second sub-pixels in the second pixel units, and the light-emitting area of the second sub-pixels in the first pixel units is the same as the light-emitting area of the first sub-pixels in the second pixel units. According to the utility model, the color deviation can be reduced, the display is more natural, the uniformity of the overall brightness output is improved, the phenomenon of non-uniform local brightness is avoided, the aging speed of materials is delayed, the service life of the display screen is prolonged, the power consumption is reduced, the color and brightness performance at multiple angles is improved, and the consistency of visual angles is ensured.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to an OLED pixel structure and an OLED display screen. Background Technology

[0002] OLED (Organic Light Emitting Diode) displays hold a significant position in the display equipment market due to their superior display performance, slim and lightweight design, energy efficiency, fast response time, and flexible bendability. With continuous technological advancements and cost reductions, OLED displays are finding increasingly wider applications, particularly in electronic devices such as smartphones, tablets, and personal PCs.

[0003] In existing OLED pixels, R, G, and B sub-pixels are arranged alternately and repeatedly in a plane. Three adjacent sub-pixels constitute a pixel unit that can emit any color, i.e., a basic image unit. The pixel units are arranged repeatedly in a plane to form the display screen, ensuring that the distribution and size of the R, G, and B sub-pixels in adjacent pixel units are consistent. Patent application number CN201310026524.3 discloses a pixel structure for an OLED display, which includes multiple rows of pixel unit groups. Each pixel unit group includes multiple pixel units arranged in a repeating sequence. Each pixel unit includes a first sub-pixel, a second sub-pixel, and a third sub-pixel. Identical sub-pixels in adjacent rows of pixel units are staggered along the horizontal direction. This increases the distance between the corresponding sub-pixel openings and enhances the strength of the metal mask. Under certain process conditions, smaller pixel units can be manufactured, thereby improving the resolution of the organic light-emitting display. Patent application number CN201520700528.X discloses an OLED pixel structure, including a plurality of matrix-arranged pixel loop units. Each pixel loop unit includes two mirror-symmetrical pixel clusters. Each pixel cluster includes two first sub-pixels, two second sub-pixels, and one third sub-pixel. Within each pixel cluster, the line connecting the center points of the first sub-pixels, the second sub-pixels, and the third sub-pixels forms a triangle. Adjacent first sub-pixels, second sub-pixels, and third sub-pixels form a basic pixel unit. Each pixel cluster contains two basic pixel units, which effectively reduces the gap space, improves the resolution and pixel density of the display, reduces manufacturing difficulty and cost, and avoids the color mixing problem of OLED materials.

[0004] However, the traditional OLED pixel design has the following problems: (1) Due to the fixed distribution of red, green and blue sub-pixels, it is easy to cause uneven light output of different colors, which will affect the display effect. Especially when the human eye is more sensitive to green, a green-dominated color shift is likely to occur; (2) Due to the different contributions of red, green and blue sub-pixels to the overall brightness, uneven brightness may occur when displaying bright areas or pure color content, especially when displaying bright or pure color areas; (3) The aging speed of light-emitting materials of different colors is different, especially blue decays the fastest, followed by red and green the slowest, which will lead to excessive aging of blue and red, affecting the service life of the display screen. Therefore, this utility model discloses an OLED pixel structure and an OLED display screen to solve the above problems. Utility Model Content

[0005] Based on this, it is necessary to address the aforementioned technical issues by providing an OLED pixel structure and an OLED display screen. By staggering the distribution of the first and second pixel units in the matrix, the light output intensity of each color can be balanced, reducing color deviation, making the display more natural, improving the uniformity of overall brightness output, and avoiding local brightness unevenness. The staggered area design reduces the driving load of sub-pixels in a single area, slows down the material aging rate, extends the lifespan of the display screen, and reduces power consumption. The staggered distribution of sub-pixel areas reduces viewing angle dependence, improves color and brightness performance at multiple angles, and ensures viewing angle consistency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An OLED pixel structure includes pixel units arranged in a matrix. Each pixel unit includes a first pixel unit and a second pixel unit, and each pixel unit contains a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first pixel unit and the second pixel unit are staggered in the matrix.

[0008] The light-emitting area of ​​the first sub-pixel in the first pixel unit is the same as the light-emitting area of ​​the second sub-pixel in the second pixel unit;

[0009] The light-emitting area of ​​the second sub-pixel in the first pixel unit is the same as the light-emitting area of ​​the first sub-pixel in the second pixel unit.

[0010] In a preferred embodiment of the OLED pixel structure provided by this utility model, the odd-numbered columns of the odd-numbered rows of the matrix-arranged pixel units are the first pixel units, the even-numbered columns of the odd-numbered rows are the second pixel units, the odd-numbered columns of the even-numbered rows are the second pixel units, and the even-numbered columns of the even-numbered rows are the first pixel units.

[0011] In a preferred embodiment of the OLED pixel structure provided by this utility model, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

[0012] In a preferred embodiment of the OLED pixel structure provided by this utility model, the light-emitting area of ​​the third sub-pixel in the first pixel unit is the same as the light-emitting area of ​​the third sub-pixel in the second pixel unit.

[0013] In a preferred embodiment of the OLED pixel structure provided by this utility model, the light-emitting area of ​​the blue sub-pixel is larger than the light-emitting area of ​​the red sub-pixel and the light-emitting area of ​​the green sub-pixel.

[0014] In a preferred embodiment of the OLED pixel structure provided by this utility model, the periphery of the pixel unit is square, and the light-emitting surfaces of the first sub-pixel, the second sub-pixel, and the third sub-pixel are all rectangular.

[0015] In a preferred embodiment of the OLED pixel structure provided by this utility model, the four corners of the light-emitting surfaces of the first sub-pixel, the second sub-pixel, and the third sub-pixel are all provided with rounded chamfers of the same size.

[0016] In a preferred embodiment of the OLED pixel structure provided by this utility model, the distance between the first sub-pixel, the second sub-pixel and the third sub-pixel in the pixel unit is the same and is 15% of the outer side length of the pixel unit.

[0017] In a preferred embodiment of the OLED pixel structure provided by this utility model, the distances from the first sub-pixel, the second sub-pixel, and the third sub-pixel in the pixel unit to the periphery of the pixel unit are the same and are 10% of the periphery length of the pixel unit.

[0018] An OLED display screen comprising the aforementioned OLED pixel structure.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The OLED pixel structure and OLED display screen provided by the present invention distribute the first pixel unit and the second pixel unit in a staggered manner in the matrix, which can balance the light output intensity of each color, reduce color deviation, make the display more natural, improve the uniformity of overall brightness output, avoid local brightness unevenness, reduce the driving load of sub-pixels in a single area, slow down the material aging speed, extend the service life of the display screen, reduce power consumption, and reduce viewing angle dependence by staggering the sub-pixel area, improve the color and brightness performance at multiple angles, and ensure the consistency of viewing angle. Attached Figure Description

[0020] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the overall structure of the OLED pixel structure provided by this utility model;

[0022] Figure 2 A schematic diagram of the first pixel unit structure in the OLED pixel structure provided by this utility model;

[0023] Figure 3 A schematic diagram of the second pixel unit structure in the OLED pixel structure provided by this utility model;

[0024] Figure 4 A schematic diagram of the periphery of a pixel unit in the OLED pixel structure provided by this utility model;

[0025] Figure 5 A schematic diagram showing the size of the first pixel unit in the OLED pixel structure provided by this utility model;

[0026] Figure 6 A schematic diagram of the size of the second pixel unit in the OLED pixel structure provided by this utility model.

[0027] The markings in the diagram are explained as follows:

[0028] 1. First pixel unit; 2. Second pixel unit; 3. First sub-pixel; 4. Second sub-pixel; 5. Third sub-pixel. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] As described in the background art, the pixel design of traditional OLED has the following problems: (1) Due to the fixed distribution of red, green and blue sub-pixels, it is easy to cause uneven light output of different colors, which in turn affects the display effect. Especially when the human eye is more sensitive to green, it is easy to have a green-dominated color shift phenomenon; (2) Due to the different contributions of red, green and blue sub-pixels to the overall brightness, uneven brightness may occur when displaying bright areas or pure color content, especially when displaying bright or pure color areas; (3) The aging speed of light-emitting materials of different colors is different, especially blue decays the fastest, followed by red and green the slowest, which will lead to excessive aging of blue and red, affecting the service life of the display screen.

[0031] To address this technical problem, this invention provides an OLED pixel structure and an OLED display screen, which are applied in the field of display screens.

[0032] For details, please refer to Figure 1-6 The OLED pixel structure specifically includes pixel units arranged in a matrix. Each pixel unit includes a first pixel unit 1 and a second pixel unit 2, and each pixel unit contains a first sub-pixel 3, a second sub-pixel 4 and a third sub-pixel 5. The first pixel unit 1 and the second pixel unit 2 are staggered in the matrix.

[0033] The light-emitting area of ​​the first sub-pixel 3 in the first pixel unit 1 is the same as the light-emitting area of ​​the second sub-pixel 4 in the second pixel unit 2;

[0034] The light-emitting area of ​​the second sub-pixel 4 in the first pixel unit 1 is the same as the light-emitting area of ​​the first sub-pixel 3 in the second pixel unit 2.

[0035] The OLED pixel structure and OLED display provided by this utility model distribute the first pixel unit 1 and the second pixel unit 2 in a staggered manner in the matrix, which can balance the light output intensity of each color, reduce color deviation, make the display more natural, improve the uniformity of overall brightness output, avoid local brightness unevenness, reduce the driving load of sub-pixels in a single area, slow down the material aging speed, extend the service life of the display, and reduce power consumption. The staggered distribution of sub-pixel areas reduces viewing angle dependence, improves color and brightness performance at multiple angles, and ensures viewing angle consistency.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] Example 1

[0040] Please refer to Figure 1-6 This paper provides an OLED pixel structure, which consists of pixel units with a certain number of rows and columns, so that the pixel units are arranged in a matrix. The specific number of rows and columns is designed according to the terminal requirements, and both the number of rows and columns are required to be even numbers, ultimately forming an H*V resolution display screen.

[0041] The pixel unit includes a first pixel unit 1 and a second pixel unit 2. Each pixel unit contains a first sub-pixel 3, a second sub-pixel 4, and a third sub-pixel 5. In this example, the first sub-pixel 3 is a red sub-pixel, the second sub-pixel 4 is a green sub-pixel, and the third sub-pixel 5 is a blue sub-pixel. The first pixel unit 1 and the second pixel unit 2 are staggered in the matrix. Specifically, the light-emitting area of ​​the first sub-pixel 3 in the first pixel unit 1 is the same as the light-emitting area of ​​the second sub-pixel 4 in the second pixel unit 2, i.e., LR11=LG21, LR12=LG22. The light-emitting area of ​​the second sub-pixel 4 in the first pixel unit 1 is the same as the light-emitting area of ​​the first sub-pixel 3 in the second pixel unit 2, i.e., LG11=LG21, LG12=LG22. The light-emitting area of ​​the third sub-pixel 5 in the first pixel unit 1 is the same as the light-emitting area of ​​the third sub-pixel 5 in the second pixel unit 2, i.e., LB11=LB21, LB12=LB22.

[0042] Furthermore, in the matrix-arranged pixel units, the odd-numbered columns of the odd-numbered rows are the first pixel unit 1, the even-numbered columns of the odd-numbered rows are the second pixel unit 2, the odd-numbered columns of the even-numbered rows are the second pixel unit 2, and the even-numbered columns of the even-numbered rows are the first pixel unit 1.

[0043] Furthermore, the light-emitting area of ​​the blue sub-pixel is larger than that of the red sub-pixel and the green sub-pixel.

[0044] Example 2

[0045] The OLED pixel structure provided in Embodiment 1 is further optimized, specifically, as follows: Figure 4-6As shown, the outer perimeter of each pixel unit is square, and the outer perimeters of the first pixel unit 1 and the second pixel unit 2 are of equal size, ensuring that the pixel units in each column and row are aligned, i.e., A11=A12=A13=A14=A21=A22=A23=A24. Simultaneously, the emitting surfaces of the first sub-pixel 3, the second sub-pixel 4, and the third sub-pixel 5 are all rectangular, and the four corners of the sub-pixel rectangles are rounded to a certain size. Furthermore, the rounded corner sizes of the four corners of the emitting surfaces of the first sub-pixel 3, the second sub-pixel 4, and the third sub-pixel 5 are the same, i.e., R11=R12=R13=R14=R15=R16=R17=R18=R19=R1A=R1B=R1C=R21=R22=R23=R24=R25=R26.

[0046] =R27=R28=R29=R2A=R2B=R2C.

[0047] In the distribution of the first sub-pixel 3, the second sub-pixel 4, and the third sub-pixel 5 in the pixel unit, the distances between the first sub-pixel 3, the second sub-pixel 4, and the third sub-pixel 5 in the pixel unit are the same and approximately 15% of the outer side length of the pixel unit. In this example, we take 15%, that is, the distances between the first sub-pixel 3 and the second sub-pixel 4, the distances between the second sub-pixel 4 and the third sub-pixel 5, and the distances between the first sub-pixel 3 and the third sub-pixel 5 are all the same, i.e., d11=d12=d13=d21=d22=d23≈A11*15%.

[0048] In a pixel unit, the distances from the first sub-pixel 3, the second sub-pixel 4, and the third sub-pixel 5 to the outer perimeter of the pixel unit are the same and approximately 10% of the outer perimeter length of the pixel unit. In this example, we take 10%. The distances mentioned here are all the distances between the sub-pixel and the outer perimeter of the nearest pixel unit, i.e., D11=D12=D13=D14=D15=D16=D21=D22=D23=D24=D25=D26≈A11*10%. In addition, the distances from one short side of the third sub-pixel 5 in the first pixel unit 1 and the second pixel unit 2 to the outer perimeter of the pixel unit are e11 and e21, respectively. The e11 and e21 in the first pixel unit 1 and the second pixel unit 2 are staggered vertically, and e11=e21≈A11*20%. In this example, we take 20%.

[0049] The dimensions of the first sub-pixel 3, the second sub-pixel 4, and the third sub-pixel 5 in each pixel unit are designed. In this example, the sub-pixel dimensions of the first pixel unit 1 are designed as follows:

[0050] The horizontal dimension of the red sub-pixel in the first pixel unit 1 is approximately 30% of the outer perimeter of the pixel unit, i.e., LR11≈A11*30%;

[0051] The vertical dimension of the red sub-pixel in the first pixel unit 1 is approximately 25% of the periphery of the pixel unit, i.e., LR12≈A11*25%;

[0052] The horizontal dimension of the green sub-pixel in the first pixel unit 1 is approximately 30% of the outer perimeter of the pixel unit, i.e., LG12≈A11*30%;

[0053] The vertical dimension of the green sub-pixel in the first pixel unit 1 is approximately 40% of the periphery of the pixel unit, i.e., LG11≈A11*40%;

[0054] The horizontal dimension of the blue sub-pixel in the first pixel unit 1 is approximately 35% of the outer perimeter of the pixel unit, i.e., LB12≈A11*35%;

[0055] The vertical dimension of the blue sub-pixel in the first pixel unit 1 is approximately 70% of the periphery of the pixel unit, i.e., LB11≈A11*70%.

[0056] The sub-pixels in the second pixel unit 2 are set according to the size offset principle.

[0057] Example 3

[0058] An OLED display screen includes the OLED pixel structure of Embodiment 2, and the OLED display screen is used in mobile phones, computers, iPads, etc.

[0059] Advantages of the OLED pixel structure and OLED display screen provided by this utility model:

[0060] (1) Optimize color uniformity: The staggered design of red and green sub-pixel areas can make the distribution of red and green sub-pixels in different pixel units more uniform, which helps to reduce local color deviation caused by area differences. When displaying solid colors or complex images in a large area, this staggered layout can balance color output and make the color performance of the entire display screen more consistent.

[0061] Enhancing display detail: The staggered distribution of subpixel areas allows for more natural transitions between pixels, especially in scenes rich in detail (such as textures or gradients). This design reduces graininess or color spots caused by excessively large single subpixel areas. The staggered red and green subpixel areas of adjacent pixels enhance the flexibility of subpixel distribution, thereby improving image clarity and sharpness.

[0062] Improve brightness balance: Green subpixels usually contribute the most to the overall brightness. By adjusting the area of ​​green subpixels in adjacent pixel units, more precise brightness control can be achieved, avoiding uneven display brightness caused by green areas being too large or too small. The staggered adjustment of the area of ​​red subpixels can compensate for insufficient brightness, making the screen brighter but not dazzling when displaying bright areas.

[0063] Slowing down material aging: In OLED displays, different colored light-emitting materials have different decay rates, with blue decaying the fastest, followed by red, and green decaying relatively slowly. By adjusting the area of ​​red and green sub-pixels in adjacent pixel units, the driving pressure in local areas can be distributed, slowing down the aging of sub-pixels caused by long-term operation. This staggered area design can also reduce the overuse of a single color in a single area, thereby extending the lifespan of the entire screen.

[0064] Optimize power consumption: When the green sub-pixel area is larger, it contributes more to the overall brightness. The driving intensity of red and blue can be appropriately reduced, thereby reducing power consumption. The staggered area design can further reduce energy consumption without affecting display quality, making the device more energy-efficient.

[0065] Improving viewing angle consistency: OLED displays may exhibit color shifts or uneven brightness at different viewing angles. By staggering the areas of red and green sub-pixels, the sub-pixels can be arranged more evenly at different viewing angles, thereby reducing color and brightness shifts and improving viewing angle consistency.

[0066] Supports high-resolution displays: The staggered design helps improve pixel utilization, achieving higher resolution within a limited pixel area. By precisely controlling the sub-pixel area distribution, the display's sharpness can be improved without increasing pixel density.

[0067] The OLED pixel structure and OLED display screen in this invention not only improve the display effect, but also enhance the performance and lifespan of the display screen, making it suitable for scenarios requiring high-quality display.

[0068] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An OLED pixel structure comprising pixel units arranged in a matrix, characterized in that, The pixel unit includes a first pixel unit and a second pixel unit, and each pixel unit contains a first sub-pixel, a second sub-pixel and a third sub-pixel. The first pixel unit and the second pixel unit are staggered in the matrix. The light-emitting area of ​​the first sub-pixel in the first pixel unit is the same as the light-emitting area of ​​the second sub-pixel in the second pixel unit; The light-emitting area of ​​the second sub-pixel in the first pixel unit is the same as the light-emitting area of ​​the first sub-pixel in the second pixel unit.

2. The OLED pixel structure according to claim 1, characterized in that, In the matrix arrangement of pixel units, the odd-numbered columns of the odd-numbered rows are the first pixel units, the even-numbered columns of the odd-numbered rows are the second pixel units, the odd-numbered columns of the even-numbered rows are the second pixel units, and the even-numbered columns of the even-numbered rows are the first pixel units.

3. An OLED pixel structure according to claim 1, characterized in that, The first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

4. An OLED pixel structure according to claim 3, characterized in that, The light-emitting area of ​​the third sub-pixel in the first pixel unit is the same as the light-emitting area of ​​the third sub-pixel in the second pixel unit.

5. An OLED pixel structure according to claim 3, characterized in that, The light-emitting area of ​​the blue sub-pixel is greater than that of the red sub-pixel and the green sub-pixel.

6. An OLED pixel structure according to claim 1, characterized in that, The outer perimeter of the pixel unit is square, and the light-emitting surfaces of the first sub-pixel, the second sub-pixel, and the third sub-pixel are all rectangular.

7. An OLED pixel structure according to claim 6, characterized in that, The first sub-pixel, the second sub-pixel, and the third sub-pixel all have rounded chamfers of the same size at the four corners of their light-emitting surfaces.

8. An OLED pixel structure according to claim 6, characterized in that, The distance between the first sub-pixel, the second sub-pixel, and the third sub-pixel in the pixel unit is the same and is 15% of the outer side length of the pixel unit.

9. An OLED pixel structure according to claim 6, characterized in that, The distances from the first sub-pixel, the second sub-pixel, and the third sub-pixel in the pixel unit to the outer perimeter of the pixel unit are the same and are 10% of the outer perimeter of the pixel unit.

10. An OLED display screen, characterized in that, Including the OLED pixel structure as described in any one of claims 1-9.

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