OLED pixel unit

Abstract

The utility model discloses an OLED (Organic Light Emitting Diode) pixel unit, which comprises a quadrilateral display block, a blue sub-pixel unit, a green sub-pixel unit and a red sub-pixel unit are arranged in the display block, the blue sub-pixel unit is rectangular, and the green sub-pixel unit and the red sub-pixel unit are circular. Because the pixel unit adopts the independent large-area blue sub-pixel unit, the blue light brightness is high, the arrangement and the shape of the sub-pixel are optimized, the color deviation is reduced, more accurate and vivid color reproduction is provided, the color expression is improved, the stability and the durability of the display panel are improved, the light-emitting service life is prolonged, the resolution ratio of the panel is improved, and the display quality is improved. And the image is clearer.

Description

Technical Field

[0001] The utility model relates to an OLED screen, more precisely, to an OLED pixel unit. Background Art

[0002] OLED displays are widely popular for their excellent color reproduction and high contrast, offering advantages such as energy saving, thinness, flexibility, fast response time, high brightness, wide color gamut, and low blue light. However, traditional OLED pixel arrangements often face issues such as pixel color deviation, sub-pixel lifespan variations, and high costs.

[0003] Chinese invention patent document CN107359187B discloses 1. An OLED pixel unit, characterized in that the OLED pixel unit includes: a red sub-pixel unit, a green sub-pixel unit, a blue sub-pixel unit, a yellow sub-pixel unit, and a cyan sub-pixel unit; the red sub-pixel unit, the green sub-pixel unit, the blue sub-pixel unit, the yellow sub-pixel unit, and the cyan sub-pixel unit are arranged in a matrix; wherein the area of ​​the blue sub-pixel unit is the same as the area of ​​the yellow sub-pixel unit and the cyan sub-pixel unit, the area of ​​the red sub-pixel unit is the same as the area of ​​the green sub-pixel unit, and the area of ​​the blue sub-pixel unit is twice the area of ​​the red sub-pixel unit; the emission peak of the yellow sub-pixel unit is located at 550nm-590nm; the emission peak of the cyan sub-pixel unit is located at 490nm-510nm. The sub-pixel units each include an anode layer, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode layer arranged in sequence. The light-emitting layer materials, hole transport layer materials, and electron transport layer materials of sub-pixel units of different colors are different. The light-emitting layers of the sub-pixel units of different colors have different light-emitting materials, wherein the red light-emitting material is one or more of poly (9,9-dialkyl-2,7-fluorene) -4,7-bis (2-thiophene) - (2,1,3-benzothiadiazole), poly (9-alkylcarbazole) -4,7-bis (2-thiophene) - (2,1,3-benzothiadiazole), 4,7-bis (5- (4- (1,2,2-triphenylvinyl) phenyl) thiophen-2-yl) benzo [c] (1,2,5) thiadiazole, and 4,9-bis (4- (2,2-distyryl) phenyl) naphtho [2,3-c] [1,2,5] thiadiazole; the green light-emitting material is poly (9,9-dialkyl-2,7-fluorene) - (2,1,3-benzothiadiazole), tris (8-hydroxyquinoline) The blue luminescent material is one or more of poly(9,9-dialkyl-2,7-fluorene), poly(9,9-dialkyl-2,7-fluorene)-3,7-dibenzo-S,S-dioxythiophene, 9,10-bis([1,1:3,1-o-terphenyl]-5-yl)anthracene, and 9-([1,1:3,1-o-terphenyl]-5-yl)-10-(5-phenyl-[1,1:3,1-o-terphenyl]-4-yl)anthracene; the yellow luminescent material is one or more of poly(9-alkyl-2,7-carbazole)-4,7-(2,1,3-benzothiadiazole) and 2,1,3-benzothiadiazole-4,7-bis(9-alkyl-2-carbazole); the blue-green luminescent material is poly(9-alkyl-2,7-carbazole). The thickness of the light-emitting layer is 50nm-100nm, the thickness of the hole transport layer is 20nm-50nm, and the thickness of the electron transport layer is 20nm-50nm.The hole transport layer is one or both of a hole injection layer and a hole transport layer; the electron transport layer is one or both of an electron injection layer and an electron transport layer.

[0004] Apparently, the OLED pixel unit in this patent includes red, green, blue, yellow, and cyan sub-pixels. By adding yellow and cyan sub-pixels, the types of monochromatic light emitted by the OLED pixel unit and display panel can be increased, thereby improving the color gamut of the OLED display device. However, this structure cannot solve the existing color deviation problem.

[0005] Chinese invention patent document CN103077955B discloses an organic light-emitting diode pixel structure comprising a plurality of gate lines and data lines for driving OLED pixel units. The plurality of OLED pixel units are arranged in a matrix, characterized in that the OLED pixel units are scanned L rows at a time, with each L row of OLED pixel units scanned simultaneously forming a pixel block, where L ≥ 3. The plurality of OLED pixel units are arranged in an M*N (row*column) matrix, each OLED pixel unit comprising sub-pixels of multiple colors, each sub-pixel unit being arranged cyclically in columns according to color. The number of data lines is L*N, and each pixel block is provided with L data lines within the same column of sub-pixels, with each data line connecting sub-pixels in different rows. The number of gate lines is (2 / 3)M, with each gate line connecting at least one sub-pixel unit in an adjacent row within the same column, where M ≥ 3 and is an integer multiple of 3.

[0006] Clearly, this patent improves the problem of insufficiently charged storage capacitor Cs and, correspondingly, the RC delay of the data line, thereby improving the display uniformity of the OLED display device and ensuring the display quality. It is particularly suitable for use in large-scale, ultra-high-resolution OLED displays. However, this structure cannot solve the existing color deviation problem. Utility Model Content

[0007] Based on this, it is necessary to address the above-mentioned technical issues and provide an OLED pixel unit. The OLED pixel unit includes a quadrilateral display block, within which are disposed blue, green, and red sub-pixel units. The blue sub-pixel units are rectangular, while the green and red sub-pixel units are circular. Because the pixel unit utilizes independent, large-area blue sub-pixel units, it achieves high blue light brightness, optimizes the arrangement and shape of the sub-pixels, reduces color deviation, provides more accurate and vivid color reproduction, improves color performance, increases the stability and durability of the display panel, extends the light-emitting life, and increases the panel's resolution, resulting in clearer images.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] An OLED pixel unit, characterized in that the OLED pixel unit includes a quadrilateral display block, wherein a blue sub-pixel unit, a green sub-pixel unit and a red sub-pixel unit are provided in the display block, the blue sub-pixel unit is rectangular, and the green sub-pixel unit and the red sub-pixel unit are both circular.

[0010] As a preferred embodiment of the OLED pixel unit provided by the present invention, the display block is square.

[0011] As a preferred embodiment of the OLED pixel unit provided by the present invention, the blue sub-pixel unit is a rounded rectangle.

[0012] As a preferred embodiment of the OLED pixel unit provided by the present invention, the radii of the green sub-pixel unit and the red sub-pixel unit are equal.

[0013] As a preferred embodiment of the OLED pixel unit provided by the present invention, the center points of the green sub-pixel unit and the red sub-pixel unit are collinear in the vertical direction.

[0014] As a preferred embodiment of the OLED pixel unit provided by the present invention, the green sub-pixel unit and the red sub-pixel unit extend along the length direction of the blue sub-pixel unit.

[0015] As a preferred embodiment of the OLED pixel unit provided by the present invention, the length of the blue sub-pixel unit is twice its width.

[0016] As a preferred embodiment of the OLED pixel unit provided by the present invention, the width of the blue sub-pixel unit is 40% of the length of the display block.

[0017] As a preferred embodiment of the OLED pixel unit provided by the present invention, the spacing between the outer contours of the green sub-pixel unit and the red sub-pixel unit is a first distance, the spacing between the green sub-pixel unit, the red sub-pixel unit and the blue sub-pixel unit is a second spacing, and the first distance is equal to the second spacing.

[0018] As a preferred embodiment of the OLED pixel unit provided by the present invention, the distances from the edge of the display block to the edges of the blue sub-pixel unit, the green sub-pixel unit, and the red sub-pixel unit are all equal.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The utility model provides an OLED pixel unit. Since the pixel unit adopts an independent large-area blue sub-pixel unit, the blue light brightness is high, the arrangement and shape of the sub-pixels are optimized, the color deviation is reduced, more accurate and vivid color reproduction is provided, the color performance is improved, the stability and durability of the display panel are increased, the luminous service life is extended, the resolution of the panel is improved, and the image is clearer.

[0021] Furthermore, the outer contours of the green and red sub-pixel units can be spaced at a first distance, and the distances between the green and red sub-pixel units and the blue sub-pixel units can be spaced at a second distance, with the first distance being equal to the second distance. Because the green and red sub-pixel units have equal luminous areas and the first and second distances are equal, the effective luminous brightness of the green and red sub-pixel units within the display block can be ensured to be consistent, further improving color performance.

[0022] Furthermore, the distances from the edge of the display block to the edges of the blue, green, and red sub-pixel units can be made equal. Since the distances from the edge of the display block to the edges of the blue, green, and red sub-pixel units are equal, a more uniform color rendering effect can be achieved after the pixel units are formed into an array, further improving color performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the solutions in the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1This is a schematic diagram of the structural distribution of the OLED pixel unit of the present invention;

[0025] Figure 2 This is a schematic diagram of the application of the OLED pixel unit of the utility model;

[0026] The markings in the figure are as follows: 1, display block; 2, blue sub-pixel unit; 3, green sub-pixel unit; 4, red sub-pixel unit; E1, first distance; E2, second distance. DETAILED DESCRIPTION

[0027] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] As described in the background, OLED displays are widely popular for their excellent color reproduction and high contrast, along with advantages such as energy saving, thinness, flexibility, fast response time, high brightness, wide color gamut, and low blue light. However, traditional OLED pixel arrangements often face issues such as pixel color deviation, sub-pixel lifespan variations, and high costs.

[0029] To solve this technical problem, the present invention provides an OLED pixel unit comprising a quadrilateral display block 1, within which are disposed blue sub-pixel units 2, green sub-pixel units 3, and red sub-pixel units 4. The blue sub-pixel units 2 are rectangular, while the green sub-pixel units 3 and the red sub-pixel units 4 are circular. The display block 1 is square, while the blue sub-pixel units 2 are rounded rectangles.

[0030] Through the above structural design, since the OLED pixel unit adopts an independent large-area blue sub-pixel unit 2, the blue light brightness is high, the arrangement and shape of the sub-pixels are optimized, the color deviation is reduced, more accurate and vivid color reproduction is provided, the color performance is improved, the stability and durability of the display panel are increased, the luminous service life is extended, the resolution of the panel is improved, and the image is clearer.

[0031] In order 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 described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] like Figure 1 As shown, the OLED pixel unit includes a quadrilateral display block 1, in which a blue sub-pixel unit 2, a green sub-pixel unit 3 and a red sub-pixel unit 4 are provided. The blue sub-pixel unit 2 is rectangular, and the green sub-pixel unit 3 and the red sub-pixel unit 4 are both circular.

[0035] It should be noted that the display block 1 is a square. In addition, the blue sub-pixel unit 2 is a rounded rectangle.

[0036] In addition, the radii of the green sub-pixel unit 3 and the red sub-pixel unit 4 are equal. The center points of the green sub-pixel unit 3 and the red sub-pixel unit 4 are collinear in the vertical direction.

[0037] In addition, the green sub-pixel unit 3 and the red sub-pixel unit 4 extend along the length direction of the blue sub-pixel unit 2 .

[0038] In addition, the length of the blue sub-pixel unit 2 is twice its width.

[0039] In addition, the width of the blue sub-pixel unit 2 is 40% of the length of the display block 1 .

[0040] The working mode of this embodiment is described below.

[0041] like Figure 2 As shown, the OLED pixel units are arranged two-dimensionally on a plane to form an OLED display screen.

[0042] Because the OLED pixel unit uses an independent large-area blue sub-pixel unit 2, the blue light brightness is high, the arrangement and shape of the sub-pixels are optimized, the color deviation is reduced, more accurate and vivid color reproduction is provided, the color performance is improved, the stability and durability of the display panel are increased, the luminous service life is extended, the resolution of the panel is improved, and the image is clearer.

[0043] The OLED pixel unit provided in Example 1 is further optimized. Specifically, the spacing between the outer contours of the green sub-pixel unit 3 and the red sub-pixel unit 4 is a first distance E1, and the spacing between the green sub-pixel unit 3, the red sub-pixel unit 4 and the blue sub-pixel unit 2 is a second distance E2. The first distance E1 is equal to the second distance E2.

[0044] The working mode of this embodiment is described below.

[0045] Since the light-emitting areas of the green sub-pixel unit 3 and the red sub-pixel unit 4 are equal, and the first distance E1 is equal to the second distance E2, it can be ensured that the effective light-emitting brightness of the green sub-pixel unit 3 and the red sub-pixel unit 4 in the display block 1 is consistent, further improving the color performance.

[0046] The OLED pixel unit provided in Example 1 or 2 is further optimized. Specifically, the distances from the edge of the display block 1 to the edges of the blue sub-pixel unit 2 , the green sub-pixel unit 3 and the red sub-pixel unit 4 are all equal.

[0047] The working mode of this embodiment is described below.

[0048] Since the distances from the edge of the display block 1 to the edges of the blue sub-pixel unit 2, the green sub-pixel unit 3 and the red sub-pixel unit 4 are all equal, the OLED pixel units can obtain a more uniform color effect after forming an array, further improving the color performance.

[0049] The terms "coupling" and "coupling" involved in the embodiments of this application should be understood in a broad sense. For example, they may refer to a physical direct connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0050] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. An OLED pixel unit, characterized in that: The OLED pixel unit comprises a quadrilateral display block (1), wherein a blue sub-pixel unit (2), a green sub-pixel unit (3) and a red sub-pixel unit (4) are provided in the display block (1), wherein the blue sub-pixel unit (2) is rectangular, and the green sub-pixel unit (3) and the red sub-pixel unit (4) are both circular.

2. The OLED pixel unit according to claim 1, wherein: The display block (1) is a square.

3. The OLED pixel unit according to claim 2, wherein: The blue sub-pixel unit (2) is a rounded rectangle.

4. The OLED pixel unit according to claim 2, wherein: The radii of the green sub-pixel unit (3) and the red sub-pixel unit (4) are equal.

5. The OLED pixel unit according to claim 2, wherein: The center points of the green sub-pixel unit (3) and the red sub-pixel unit (4) are collinear in the vertical direction.

6. The OLED pixel unit according to claim 2, wherein: The green sub-pixel unit (3) and the red sub-pixel unit (4) extend along the length direction of the blue sub-pixel unit (2).

7. The OLED pixel unit according to claim 2, wherein: The length of the blue sub-pixel unit (2) is twice its width.

8. The OLED pixel unit according to claim 7, wherein: The width of the blue sub-pixel unit (2) is 40% of the length of the display block (1).

9. The OLED pixel unit according to claim 8, characterized in that: The spacing between the outer contours of the green sub-pixel unit (3) and the red sub-pixel unit (4) is a first distance (E1), the spacing between the green sub-pixel unit (3) and the red sub-pixel unit (4) and the blue sub-pixel unit (2) is a second distance (E2), and the first distance (E1) and the second distance (E2) are equal.

10. The OLED pixel unit according to claim 9, characterized in that: The distances from the edge of the display block (1) to the edges of the blue sub-pixel unit (2), the green sub-pixel unit (3) and the red sub-pixel unit (4) are all equal.

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