Light-emitting substrate and splicing display device
By designing centrally symmetrically distributed light-emitting elements on the light-emitting substrate and ensuring that the same color light is arranged in a consistent manner, the problem of abnormal light mixing in splicing display devices is solved, the manufacturing cost is reduced and the display effect is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-17
AI Technical Summary
Existing splicing display devices suffer from light mixing anomalies between adjacent light-emitting substrates, and their manufacturing costs are relatively high.
Design a light-emitting substrate such that the light-emitting elements of its pixel units are symmetrically distributed about the center of symmetry and configured to emit light of the same color. Allow the light-emitting substrate to be rotated 180° without changing its arrangement. Use the same light-emitting substrate for splicing to ensure normal light mixing at the splicing seam and reduce manufacturing costs.
This solution addresses the issue of light mixing abnormalities in splicing display devices, reduces manufacturing costs, and improves display uniformity and quality.
Smart Images
Figure CN224137877U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of display technology, and in particular to a light-emitting substrate and a splicing display device. Background Technology
[0002] With the continuous development of display technology, the demand for large-scale display devices is increasing. For example, in many places such as exhibition halls, entertainment venues, train stations, airports, and monitoring and command centers, large-screen display devices are needed to display images. Due to the high difficulty in directly manufacturing large-scale display devices, existing large-scale display devices are usually made by splicing multiple display panels, i.e., splicing display devices (also known as video walls). Utility Model Content
[0003] The purpose of this disclosure is to provide a light-emitting substrate and a splicing display device to solve the problem of abnormal light mixing between adjacent light-emitting substrates in the splicing display device and to reduce the manufacturing cost of the splicing display device.
[0004] To achieve the above objectives, the embodiments of this disclosure provide the following technical solutions:
[0005] On one hand, a light-emitting substrate is provided. The light-emitting substrate includes a driving backplate and a plurality of pixel units. The driving backplate includes a display area and a peripheral area adjacent to one side of the display area. The plurality of pixel units are disposed within the display area of the driving backplate. Each pixel unit includes a plurality of light-emitting elements, wherein the plurality of light-emitting elements of a pixel unit are centrally symmetrically distributed about a center of symmetry, and two light-emitting elements centrally symmetrical about the center of symmetry are configured to emit light of the same color.
[0006] The embodiments of this disclosure provide a light-emitting substrate in which multiple (all) light-emitting elements of a pixel unit are centrally symmetrically distributed about a center of symmetry, and two centrally symmetrical light-emitting elements are configured to emit light of the same color. That is, after rotating the light-emitting substrate by 180°, the arrangement of the multiple (all) light-emitting elements of the pixel unit remains unchanged. Based on this, a splicing display device can be formed by splicing the same type of light-emitting substrate, and the multiple light-emitting elements of the light-emitting units of two light-emitting substrates in a set are arranged in the same way. In this case, at the splicing seam of the two light-emitting substrates, there will be no problem of abnormal light mixing due to the different arrangements of the light-emitting elements on the two light-emitting substrates. Furthermore, the splicing display device is fabricated using light-emitting substrates with the same structure, which helps to reduce the manufacturing cost of the splicing display device.
[0007] In some embodiments, the display area extends along a first direction from the edge away from the peripheral area. The plurality of light-emitting elements of a pixel unit are arranged along the first direction.
[0008] In some embodiments, the display area extends along a first direction from the edge away from the peripheral area. The plurality of light-emitting elements of a pixel unit are arranged along a second direction perpendicular to the first direction.
[0009] In some embodiments, a pixel unit includes at least one first light-emitting element, two second light-emitting elements, and two third light-emitting elements; one of the first, second, and third light-emitting elements is configured to emit red light, another is configured to emit green light, and yet another is configured to emit blue light. The two second light-emitting elements are respectively disposed on opposite sides of the at least one first light-emitting element, and the two third light-emitting elements are respectively disposed on the side of the two second light-emitting elements away from the first light-emitting element.
[0010] In some embodiments, the display area extends along a first direction from the edge away from the peripheral area. The plurality of light-emitting elements of a pixel unit are arranged in multiple rows along a second direction, with at least one row including at least two light-emitting elements arranged along the first direction. The second direction intersects the first direction.
[0011] In some embodiments, a pixel unit includes at least one first light-emitting element, two second light-emitting elements, and two third light-emitting elements; one of the first, second, and third light-emitting elements is configured to emit red light, another is configured to emit green light, and yet another is configured to emit blue light. The outer edges of the plurality of light-emitting elements of a pixel unit are connected to form a rectangle, the at least one first light-emitting element is disposed inside the rectangle, the two second light-emitting elements are respectively disposed at both ends of one diagonal of the rectangle, and the two third light-emitting elements are respectively disposed at both ends of the other diagonal of the rectangle.
[0012] In some embodiments, one pixel unit includes a first light-emitting element configured to emit green light. The first light-emitting element is disposed at the center of symmetry, two second light-emitting elements are symmetrically disposed about the center of the first light-emitting element, and two third light-emitting elements are symmetrically disposed about the center of the first light-emitting element.
[0013] In some embodiments, of the two second light-emitting elements and the two third light-emitting elements, one configured to emit red light is connected in series, and the other configured to emit blue light is connected in series or in parallel.
[0014] In some embodiments, the light-emitting area of the light-emitting element configured to emit red light is greater than the light-emitting area of the light-emitting element configured to emit green light, and is also greater than the light-emitting area of the light-emitting element configured to emit blue light.
[0015] In some embodiments, the maximum distance between the two farthest light-emitting elements within a pixel unit is less than the minimum interval between two adjacent pixel units.
[0016] In some embodiments, the light-emitting substrate further includes an encapsulation layer. The encapsulation layer is disposed on the side of the light-emitting element away from the driving backplate and covers the light-emitting element; the refractive index of the encapsulation layer is N, the maximum emission angle of the light-emitting element is α, the height of the light-emitting element is H1, and the interval between two adjacent light-emitting elements is D1; wherein N, α, H1, and D1 satisfy: D1≥H1×tanα.
[0017] In some embodiments, the boundary of the display area away from the peripheral area is a first boundary, the thickness of the encapsulation layer is H2, and the minimum interval between the pixel unit and the first boundary is D2, wherein H2 and D2 satisfy: D2≥H2×tanα.
[0018] On the other hand, a display device is provided. The display device includes M groups of light-emitting substrates as described in any of the above embodiments, where M is a natural number greater than or equal to 1. The M groups of light-emitting substrates are arranged along a first direction, and each group includes two light-emitting substrates arranged along a second direction; the first direction intersects the second direction. Specifically, two display areas of the two light-emitting substrates in one group are arranged adjacent to each other, and two peripheral areas of the two light-emitting substrates in one group are respectively located at both ends of the light-emitting substrates in the group along the second direction.
[0019] In some embodiments, the interval between the two closest pixels of two light-emitting substrates belonging to a group is equal to the interval between two adjacent pixels within the light-emitting substrate.
[0020] The above-described splicing display device has the same structure and beneficial technical effects as the light-emitting substrate provided in some of the above embodiments, and will not be described again here. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.
[0022] Figure 1A This is a structural diagram of a splicing display device according to some embodiments;
[0023] Figure 1B This is a structural diagram of a set of light-emitting substrates according to some embodiments;
[0024] Figure 2 This is a structural diagram of a pixel unit composition of a light-emitting substrate according to some embodiments;
[0025] Figure 3 For along Figure 2 Sectional view along section line A1-A1;
[0026] Figure 4 This is a pixel unit structure diagram of a splicing display device in related technologies;
[0027] Figure 5 According to some embodiments Figure 2 The diagram shows the structure of a splicing display device formed by a light-emitting substrate.
[0028] Figure 6 This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0029] Figure 7 This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0030] Figure 8 This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0031] Figure 9 This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0032] Figure 10 This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0033] Figure 11 This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0034] Figure 12This is a structural diagram of another pixel unit composition of a light-emitting substrate according to some embodiments;
[0035] Figure 13A This is a structural diagram of a pixel unit according to some embodiments;
[0036] Figure 13B This is a structural diagram of another pixel unit composition according to some embodiments;
[0037] Figure 14 For along Figure 2 Sectional view along section line A2-A2. Detailed Implementation
[0038] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.
[0039] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.
[0040] In this disclosure, terms such as “down,” “below,” “above,” and “up” are used to explain the relationships between components shown in the accompanying drawings. The terms may be relative concepts and described based on the directions shown in the drawings, or based on the sequence of process steps, but are not limited thereto.
[0041] The term "relative" means that the first element can be directly or indirectly relative to the second element. In the case where the third element is between the first and second elements, although they are still relative to each other, the first and second elements can be understood as being indirectly relative to each other.
[0042] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.
[0043] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.
[0044] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.
[0045] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values may in practice be based on additional conditions or values beyond those stated.
[0046] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.
[0047] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.
[0048] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.
[0049] See Figure 1A and Figure 1B Some embodiments of this disclosure provide a splicing display device 1000, which can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images) and whether it is text or images.
[0050] For example, see Figure 1A and Figure 1B The aforementioned splicing display device 1000 can be any product or component with display function, such as electronic billboards, shopping mall displays, signs, televisions, computers, in-flight displays, vehicle displays, clocks, etc.
[0051] In some embodiments, see Figure 1A and Figure 1B The splicing display device 1000 may include M groups of light-emitting substrates 100A, where M is a natural number greater than or equal to 1. For example, M can be 1, 2, 3, 4, or 5, etc. In the embodiments disclosed herein, the value of M is not specifically limited. The M groups of light-emitting substrates 100A are arranged along a first direction X, and each group of light-emitting substrates 100A includes two light-emitting substrates 100 arranged along a second direction Y. That is, the splicing display device 1000 includes 2 × M light-emitting substrates 100. The first direction X intersects the second direction Y; for example, the first direction X and the second direction Y can be perpendicular to each other.
[0052] In some embodiments, from the perspective of the light emission type of the light-emitting substrate 100, the light-emitting substrate 100 can be an organic light-emitting diode (OLED) light-emitting substrate, a liquid crystal display (LCD) light-emitting substrate, a micro light-emitting diode (Micro LED) light-emitting substrate, or a mini light-emitting diode (Mini LED) light-emitting substrate, etc. Among them, Micro LED and Mini LED light-emitting substrates have excellent performance in terms of luminous brightness, lifespan, contrast ratio, response time, energy consumption, viewing angle, and resolution, and are widely used in splicing display devices.
[0053] In some embodiments, such as Figure 1B and Figure 2 As shown, the light-emitting substrate 100 may include a display area AA and a peripheral area BB. The peripheral area BB may be adjacent to one side of the display area AA, that is, the peripheral area BB is only disposed on one side of the display area AA. The peripheral area BB can also be called a fanout area. In other words, the light-emitting substrate 100 has a three-sided frameless structure. In this way, the size of the non-light-emitting area on both sides of the splicing seam 200 in the splicing display device 1000 can be greatly reduced, which is beneficial to improving the display uniformity of the splicing display device 1000 at the display area AA and the splicing seam 200 of the light-emitting substrate 100, and improving the display quality of the splicing display device 1000. Here, the above-mentioned "splicing seam" refers to the dividing line between two adjacent light-emitting substrates 100 in the splicing display device 1000. It should be understood that there may be a gap between two adjacent light-emitting substrates 100, or the two adjacent light-emitting substrates 100 may abut against each other, that is, there may be no gap between two adjacent light-emitting substrates 100.
[0054] like Figure 1B As shown, in the case where multiple light-emitting substrates 100 are spliced together to form a splicing display device 1000, the display areas AA of the light-emitting substrates 100 are arranged adjacent to each other, and the two peripheral areas BB of two light-emitting substrates 100 in one group are respectively located at both ends of the group of light-emitting substrates 100 along the second direction Y. For example, in Figure 1B In this design, the peripheral area BB of the upper light-emitting substrate 100 is located above its display area AA, and the peripheral area BB of the lower light-emitting substrate 100 is located below its display area AA. This greatly reduces the size of the non-light-emitting area at the splicing seam between the two light-emitting substrates 100 in a set, thereby improving the display uniformity of the splicing display device 1000.
[0055] See also Figure 2 and Figure 3 In some embodiments, the light-emitting substrate 100 may include a driving backplate 10 and a plurality of pixel units P disposed on the driving backplate 10. The pixel units P may be disposed within the display area AA of the driving backplate 10. The pixel unit P includes a plurality of light-emitting elements 20. At least two light-emitting elements 20 in the pixel unit P are configured to emit light of different colors.
[0056] For example, all of the light-emitting elements 20 of a pixel unit P may include at least one red light-emitting element R configured to emit red light, at least one green light-emitting element G configured to emit green light, and at least one blue light-emitting element B configured to emit blue light. Alternatively, all of the light-emitting elements 20 of a pixel unit P may also include a white light-emitting element for emitting white light. The embodiments of this disclosure will be described below by way of example, using a pixel unit P where all of the light-emitting elements 20 include a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B.
[0057] In this context, pixel unit P can also be called a pixel, and light-emitting element 20 refers to the smallest unit in the light-emitting substrate 100 that can emit light, which can also be called a sub-pixel. A driving circuit can be provided on the driving backplate 10, and the light-emitting element 20 is connected to the driving circuit. The driving circuit can transmit driving current (driving voltage) to the light-emitting element 20, thereby driving the light-emitting element 20 to emit light.
[0058] In some embodiments, when the light-emitting substrate 100 is a Mini LED or Micro LED light-emitting substrate, the light-emitting substrate 100 can be directly used for image display. In this case, the light-emitting element 20 can be a Mini LED light-emitting chip or a Micro LED light-emitting chip. A Mini LED light-emitting chip refers to an LED light-emitting chip with a size of 100μm to 500μm, and a Micro LED light-emitting chip refers to an LED light-emitting chip with a size of less than 100μm.
[0059] See related technologies. Figure 4 The pixel unit P of the light-emitting substrate 100 typically includes a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B, and the aforementioned red light-emitting element R, green light-emitting element G, and blue light-emitting element B are typically arranged in a straight line (e.g., horizontally). In the case of splicing the light-emitting substrate 100 to form a splicing display device 1000, there are generally two methods: one is that two light-emitting substrates 100 use light-emitting substrates 100 with identical structures, in which case the arrangement of the light-emitting elements 20 of the pixel unit P of the two light-emitting substrates 100 is different (e.g., ...). Figure 4As shown in the figure, specifically, for the upper light-emitting substrate 100, the pixel units P from left to right are red light-emitting element R, blue light-emitting element B, and green light-emitting element G; for the lower light-emitting substrate 100, the pixel units P from left to right are green light-emitting element G, blue light-emitting element B, and red light-emitting element R. This can lead to an abnormal light mixing problem between the two light-emitting substrates 100 near the splicing seam 200. Another option is to use light-emitting substrates with different structures (not shown in the figure) for the two light-emitting substrates 100 in a set, so that the arrangement of the light-emitting elements in the pixel units P of the two light-emitting substrates 100 in a set is different. This requires the design and manufacture of two light-emitting substrates 100 with different structures. For the company's production, this will increase the management difficulty and waste materials, which is not conducive to reducing the manufacturing cost of the splicing display device.
[0060] To solve at least one of the above technical problems, see [reference] Figure 2 and Figure 5 In a pixel unit P of the light-emitting substrate 100, all of the light-emitting elements 20 are centrally symmetrically distributed about a center of symmetry C. Two light-emitting elements 20 that are centrally symmetrical about the center of symmetry C are configured to emit light of the same color. That is, even after rotating the light-emitting substrate 100 by 180°, the arrangement of all of the light-emitting elements 20 in the pixel unit P remains unchanged. Based on this, the splicing display device 1000 can be formed by splicing the same type of light-emitting substrate 100, and the arrangement of the light-emitting elements 20 in the light-emitting units P of two light-emitting substrates 100 in a set is the same. Therefore, at the splicing seam 200 of the two light-emitting substrates 100, there will be no problem of abnormal light mixing due to different arrangements of the light-emitting elements 20. Furthermore, the splicing display device 1000 is fabricated using light-emitting substrates 100 with the same structure, which helps to reduce the manufacturing cost of the splicing display device 1000.
[0061] In some embodiments, such as Figure 2 As shown, the edge of the display area AA, away from the peripheral area BB, extends along the first direction X. Multiple light-emitting elements 20 of a pixel unit P are arranged along the first direction X.
[0062] Continue reading Figure 2 A pixel unit P includes at least one first light-emitting element 21, two second light-emitting elements 22, and two third light-emitting elements 23. The two second light-emitting elements 22 are respectively disposed on opposite sides of at least one (all) first light-emitting elements 21, and the two third light-emitting elements 23 are respectively disposed on the side of the two second light-emitting elements 22 away from the first light-emitting elements 21. The two second light-emitting elements 22 and the two third light-emitting elements 23 can be symmetrically arranged about all the first light-emitting elements 21.
[0063] One of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 is configured to emit red light, another is configured to emit green light, and yet another is configured to emit blue light; that is, one of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 is a red light-emitting element R, another is a green light-emitting element G, and yet another is a blue light-emitting element B. In other words, in the pixel unit P, the arrangement order of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be flexibly set as needed.
[0064] For example, such as Figure 2 As shown, a pixel unit P includes a first light-emitting element 21, which is configured to emit green light; that is, the first light-emitting element 21 is a green light-emitting element G. The first light-emitting element 21 is disposed at the center of symmetry C, for example, the geometric center of the first light-emitting element 21 coincides with the center of symmetry C. The second light-emitting element 22 can be a blue light-emitting element B, and the third light-emitting element 23 can be a red light-emitting element R. The two second light-emitting elements 22 are symmetrically arranged about the center of the first light-emitting element 21, and the two third light-emitting elements 23 are symmetrically arranged about the center of the first light-emitting element 21.
[0065] For example, such as Figure 6 As shown, a pixel unit P includes a first light-emitting element 21, which is a green light-emitting element G. The second light-emitting element 22 can be a red light-emitting element R, and the third light-emitting element 23 can be a blue light-emitting element B. The first light-emitting element 21 is disposed at the center of symmetry C, the two second light-emitting elements 22 are symmetrically disposed about the center of the first light-emitting element 21, and the two third light-emitting elements 23 are symmetrically disposed about the center of the first light-emitting element 21.
[0066] For example, such as Figure 7 As shown, a pixel unit P includes two first light-emitting elements 21. The first light-emitting element 21 is a green light-emitting element G, the second light-emitting element 22 can be a red light-emitting element R, and the third light-emitting element 23 can be a blue light-emitting element B. The two first light-emitting elements 21 are centrally symmetrical about a center of symmetry C, which is located at the midpoint between the two first light-emitting elements 21. The two second light-emitting elements 22 are centrally symmetrical about a center of symmetry C, and the two third light-emitting elements 23 are centrally symmetrical about a center of symmetry C.
[0067] Of course, the embodiments disclosed herein are not limited to those described above. Figure 2 , Figure 6 and Figure 7In the three specific examples shown, the positions of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be designed as needed. For example, the first light-emitting element 21 can also be a blue light-emitting element B or a red light-emitting element R; and the number of the first light-emitting elements 21 can be 1, 2, or 3, etc. The embodiments disclosed herein will not be listed one by one.
[0068] In some embodiments, see Figures 8-10 The edge (upper edge) of the display area AA, away from the peripheral area BB, extends along the first direction X. Multiple light-emitting elements 20 of a pixel unit P are arranged along the second direction Y, which intersects the first direction X; for example, the second direction Y is perpendicular to the first direction X.
[0069] Continue reading Figures 8-10 A pixel unit P includes at least one first light-emitting element 21, two second light-emitting elements 22, and two third light-emitting elements 23. The two second light-emitting elements 22 are respectively disposed on opposite sides of at least one (all) first light-emitting elements 21, and the two third light-emitting elements 23 are respectively disposed on the side of the two second light-emitting elements 22 away from the first light-emitting elements 21. The two second light-emitting elements 22 and the two third light-emitting elements 23 can be symmetrically arranged about the first light-emitting element 21.
[0070] One of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 is configured to emit red light, another is configured to emit green light, and yet another is configured to emit blue light; that is, one of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 is a red light-emitting element R, another is a green light-emitting element G, and yet another is a blue light-emitting element B. In other words, in the pixel unit P, the arrangement order of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be flexibly set as needed.
[0071] For example, such as Figure 8 As shown, a pixel unit P includes a first light-emitting element 21, which is configured to emit green light; that is, the first light-emitting element 21 is a green light-emitting element G. The first light-emitting element 21 is disposed at the center of symmetry C, for example, the geometric center of the first light-emitting element 21 coincides with the center of symmetry C. The second light-emitting element 22 can be a blue light-emitting element B, and the third light-emitting element 23 can be a red light-emitting element R. The two second light-emitting elements 22 are symmetrically arranged about the center of the first light-emitting element 21, and the two third light-emitting elements 23 are symmetrically arranged about the center of the first light-emitting element 21.
[0072] For example, such as Figure 9As shown, a pixel unit P includes a first light-emitting element 21, which is a green light-emitting element G; a second light-emitting element 22, which can be a red light-emitting element R; and a third light-emitting element 23, which can be a blue light-emitting element B. The first light-emitting element 21 is disposed at the center of symmetry C; two second light-emitting elements 22 are disposed symmetrically about the center of the first light-emitting element 21; and two third light-emitting elements 23 are disposed symmetrically about the center of the first light-emitting element 21.
[0073] For example, such as Figure 10 As shown, a pixel unit P includes two first light-emitting elements 21. The first light-emitting element 21 is a blue light-emitting element G, the second light-emitting element 22 can be a red light-emitting element R, and the third light-emitting element 23 can be a green light-emitting element B. The two first light-emitting elements 21 are symmetrically arranged about a center of symmetry C, which is located at the midpoint between the two first light-emitting elements 21. The two second light-emitting elements 22 are also symmetrically arranged about a center of symmetry C, and the two third light-emitting elements 23 are also symmetrically arranged about a center of symmetry C.
[0074] Of course, the embodiments disclosed herein are not limited to those described above. Figures 8-10 In the three specific examples shown, the positions of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be designed as needed. For example, the first light-emitting element 21 can also be a blue light-emitting element B or a red light-emitting element R; and the number of the first light-emitting elements 21 can be 1, 2, or 3, etc. The embodiments disclosed herein will not be listed one by one.
[0075] In some embodiments, see Figure 11 , Figure 12 , Figure 13A and Figure 13B The display area AA extends along the first direction X away from the edge of the surrounding area BB. Multiple light-emitting elements 20 of a pixel unit P are arranged in multiple rows along the second direction Y, with at least one row including at least two light-emitting elements 21 arranged along the first direction X. That is, the multiple light-emitting elements 20 of a pixel unit P may not be arranged in a straight line.
[0076] For example, the lines connecting the outer contours of the multiple light-emitting elements 20 of a pixel unit P can form a rectangle or a regular polygon with an even number of sides (such as a regular hexagon or a regular octagon). Two light-emitting elements 20 for emitting light of the same color are respectively arranged on the diagonal of the regular polygon. At least one light-emitting element may also be arranged inside the regular polygon, or no light-emitting element may be arranged.
[0077] In some embodiments, see Figure 11 and Figure 12A pixel unit P includes at least one first light-emitting element 21, two second light-emitting elements 22, and two third light-emitting elements 23. The lines connecting the outer edges of the plurality of light-emitting elements 20 of a pixel unit P form a rectangle. At least one (all) first light-emitting elements 21 are disposed inside the rectangle, two second light-emitting elements 22 are respectively disposed at both ends of one diagonal of the rectangle, and two third light-emitting elements 23 are respectively disposed at both ends of the other diagonal of the rectangle.
[0078] Among them, one of the first light-emitting element 21, the second light-emitting element 22 and the third light-emitting element 23 is configured to emit red light, another is configured to emit green light and yet another is configured to emit blue light; that is, one of the first light-emitting element 21, the second light-emitting element 22 and the third light-emitting element 23 is a red light-emitting element R, another is a green light-emitting element G and yet another is a blue light-emitting element B. In other words, in the pixel unit P, the arrangement order of the red light-emitting element R, the green light-emitting element G and the blue light-emitting element B can be flexibly set as needed.
[0079] For example, such as Figure 11 As shown, a pixel unit P includes a first light-emitting element 21, which is configured to emit green light; that is, the first light-emitting element 21 is a green light-emitting element G. The second light-emitting element 22 can be a blue light-emitting element B, and the third light-emitting element 23 can be a red light-emitting element R. The first light-emitting element 21 is located at the center of symmetry C (the center point of the rectangle), for example, the geometric center of the first light-emitting element 21 coincides with the center of symmetry C. Two second light-emitting elements 22 are located at both ends of one diagonal of the rectangle, and two third light-emitting elements 23 are located at both ends of the other diagonal of the rectangle.
[0080] For example, such as Figure 12 As shown, a pixel unit P includes two first light-emitting elements 21, which are green light-emitting elements G. The second light-emitting element 22 can be a red light-emitting element R, and the third light-emitting element 23 can be a blue light-emitting element B. The two first light-emitting elements 21 are disposed inside a rectangle and are centrally symmetrical about the center of symmetry C. The two second light-emitting elements 22 are disposed at both ends of one diagonal of the rectangle, and the two third light-emitting elements 23 are disposed at both ends of the other diagonal of the rectangle.
[0081] For example, such as Figure 13A and Figure 13B As shown, a pixel unit P includes two first light-emitting elements 21, two second light-emitting elements 22, and two third light-emitting elements 23. The first light-emitting element 21 is a green light-emitting element G, the second light-emitting element 22 can be a red light-emitting element R, and the third light-emitting element 23 can be a blue light-emitting element B. Figure 13A As shown, the lines connecting the outer edges of the six light-emitting elements 20 of pixel unit P can form a regular hexagon, with two first light-emitting elements 21, two second light-emitting elements 22, and two third light-emitting elements 23 respectively positioned at both ends of a diagonal of the regular hexagon. Figure 13B As shown, the lines connecting the outer edges of the six light-emitting elements 20 of the pixel unit P can form a rectangle. The two first light-emitting elements 21 and the two third light-emitting elements 23 are respectively located at the two ends of one diagonal of the rectangle, and the two second light-emitting elements 22 are located at the midpoints of a pair of opposite sides.
[0082] Of course, the embodiments disclosed herein are not limited to those described above. Figure 11 , Figure 12 , Figure 13A and Figure 13B The four specific examples shown can be interchanged as needed, in which the positions of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B can be interchanged. For example, the number of the first light-emitting element 21 can be 1, 2, or 3, etc. The embodiments disclosed herein will not be listed one by one.
[0083] In some embodiments, such as Figure 2 , Figure 6 , Figure 8 , Figure 9 and Figure 11 As shown, a pixel unit P includes a first light-emitting element 21, which is configured to emit green light, i.e., the first light-emitting element 21 is a green light-emitting element G. Compared with the luminous efficiency of the red light-emitting element R and the blue light-emitting element B, the luminous efficiency of the green light-emitting element G is higher. Setting one green light-emitting element G in a pixel unit P helps to reduce the total number of light-emitting elements 20 included in the pixel unit P, and helps to reduce the difficulty of setting up the pixel unit P.
[0084] In some embodiments, among the two second light-emitting elements 22 and two third light-emitting elements 23 included in the pixel unit P, one configured to emit red light is connected in series, and the other configured to emit blue light is connected in series or in parallel. That is, the two red light-emitting elements R included in the pixel unit P are connected in series, and the two blue light-emitting elements B are connected in series or in parallel. Research has found that, due to the characteristics of Micro LED or Mini LED light-emitting chips, the luminous efficiency of the light-emitting chip decreases rapidly as the temperature of the light-emitting substrate rises, and the luminous efficiency of the red light-emitting element R is the lowest. Therefore, the current of the red light-emitting element R accounts for the largest proportion in the light-emitting substrate 100, and the temperature rise of the red light-emitting element R is more significant. Based on this, connecting the two red light-emitting elements R in series helps to reduce the current proportion of the red light-emitting element R in the light-emitting substrate 100, reduces the temperature of the red light-emitting element R, and helps to improve the luminous efficiency of the red light-emitting element R.
[0085] In other embodiments, the light-emitting area of the light-emitting element 20 (red light-emitting element R) configured to emit red light is larger than the light-emitting area of the light-emitting element 20 (green light-emitting element G) configured to emit green light, and larger than the light-emitting area of the light-emitting element (blue light-emitting element B) configured to emit blue light. This is beneficial to increasing the light emission of the red light-emitting element R, thereby balancing the problem of the low luminous efficiency of the red light-emitting element R. It is also beneficial to reduce the operating current of the red light-emitting element R, lower the temperature of the red light-emitting element R, and improve the luminous efficiency of the red light-emitting element R.
[0086] In some embodiments, see Figure 2 as well as Figures 6-12 The maximum distance D3 between the two farthest light-emitting elements 20 in a pixel unit P is less than the minimum interval D4 between two adjacent pixel units P. In this way, the light emitted by multiple light-emitting elements 20 in a pixel unit P can be mixed first, instead of the light-emitting elements 20 of adjacent pixel units P mixing first.
[0087] In some embodiments, see Figure 2 and Figure 3 The light-emitting substrate 100 also includes an encapsulation layer 30, which may be a black film or other encapsulation. The encapsulation layer 30 is disposed on the side of the light-emitting element 20 away from the driving backplate 10 and covers the light-emitting element 20. The refractive index of the encapsulation layer 30 is N, and the maximum light emission angle of the light-emitting element 20 is α.
[0088] The height of the light-emitting element 20 is H1, and the interval between two adjacent light-emitting elements 20 is D1; wherein, α, H1, and D1 satisfy D1≥H1×tanα. In this way, the risk of the light emitted by the light-emitting element 20 being blocked by the adjacent light-emitting element 20 can be reduced, and the light extraction efficiency of the light-emitting substrate 100 can be greatly improved.
[0089] In some embodiments, such as Figure 2 and Figure 14 As shown, the boundary of the display area AA away from the surrounding area BB is the first boundary L1, the thickness of the encapsulation layer is H2, and the minimum interval between the pixel unit P and the first boundary L1 is D2, where H2 and D2 satisfy: D2≥H2×tanα. In this way, the light emitted by the light-emitting element 20 can be emitted from the surface of the encapsulation layer 30 away from the driving back plate 10, avoiding the light emitted by the light-emitting element 20 from the side of the encapsulation layer 30, improving the forward light emission efficiency of the light-emitting substrate 100, and reducing the light mixing between adjacent pixel units P of adjacent light-emitting substrates 100, thus reducing the risk of light mixing abnormalities at the splicing seam of the splicing display device.
[0090] In some embodiments, in a splicing display device 1000 formed by a plurality of the above-described light-emitting substrates 100, the spacing between adjacent pixel units P located within the light-emitting substrate 100 can be equal to the spacing between the two closest pixel units P located on two adjacent light-emitting substrates 100. In this way, the pixel unit P has an equal arrangement density at each position of the splicing display device 1000, which is beneficial to improve the uniformity of the image of the splicing display device 1000 and improve the display quality of the splicing display device 1000.
[0091] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. A light-emitting substrate, characterized by, include: The drive backplate includes a display area and a peripheral area adjacent to one side of the display area; Multiple pixel units are disposed within the display area of the driving backplate. Each pixel unit includes multiple light-emitting elements. The multiple light-emitting elements of a pixel unit are centrally symmetrically distributed about a center of symmetry, and two light-emitting elements that are centrally symmetrical about the center of symmetry are configured to emit light of the same color.
2. The light-emitting substrate according to claim 1, characterized in that, The display area extends along a first direction from the edge away from the peripheral area; The plurality of light-emitting elements of a pixel unit are arranged along the first direction.
3. The light-emitting substrate according to claim 1, characterized in that, The display area extends along a first direction from the edge away from the peripheral area; The plurality of light-emitting elements of a pixel unit are arranged along a second direction, which is perpendicular to the first direction.
4. The light-emitting substrate according to claim 2, characterized in that, A pixel unit includes at least one first light-emitting element, two second light-emitting elements, and two third light-emitting elements; one of the first light-emitting element, the second light-emitting element, and the third light-emitting element is configured to emit red light, another is configured to emit green light, and yet another is configured to emit blue light; Two second light-emitting elements are respectively disposed on opposite sides of the at least one first light-emitting element, and two third light-emitting elements are respectively disposed on the side of the two second light-emitting elements away from the first light-emitting element.
5. The light-emitting substrate according to claim 1, characterized in that, The display area extends along a first direction from the edge away from the peripheral area; The plurality of light-emitting elements of a pixel unit are arranged in multiple rows along a second direction, and at least one row includes at least two light-emitting elements arranged along the first direction; the second direction intersects the first direction.
6. The light-emitting substrate according to claim 5, characterized in that, A pixel unit includes at least one first light-emitting element, two second light-emitting elements, and two third light-emitting elements; one of the first light-emitting element, the second light-emitting element, and the third light-emitting element is configured to emit red light, another is configured to emit green light, and yet another is configured to emit blue light; The lines connecting the outer edges of the plurality of light-emitting elements of a pixel unit form a rectangle, the at least one first light-emitting element is disposed inside the rectangle, the two second light-emitting elements are respectively disposed at both ends of one diagonal of the rectangle, and the two third light-emitting elements are respectively disposed at both ends of the other diagonal of the rectangle.
7. The light-emitting substrate according to claim 4 or 6, characterized in that, One of the pixel units includes a first light-emitting element configured to emit green light; The first light-emitting element is disposed at the center of symmetry, the two second light-emitting elements are symmetrically disposed about the center of the first light-emitting element, and the two third light-emitting elements are symmetrically disposed about the center of the first light-emitting element.
8. The light-emitting substrate according to claim 7, characterized in that, Of the two second light-emitting elements and the two third light-emitting elements, the one configured to emit red light is connected in series, and the one configured to emit blue light is connected in series or in parallel.
9. The light-emitting substrate according to claim 7, characterized in that, The light-emitting area of the light-emitting element configured to emit red light is greater than the light-emitting area of the light-emitting element configured to emit green light, and is also greater than the light-emitting area of the light-emitting element configured to emit blue light.
10. The light-emitting substrate according to any one of claims 1 to 6, characterized in that, The maximum distance between the two farthest light-emitting elements within a pixel unit is less than the minimum interval between two adjacent pixel units.
11. The light-emitting substrate according to any one of claims 1 to 6, characterized in that, Also includes: An encapsulation layer is disposed on the side of the light-emitting element away from the driving backplate and covers the light-emitting element; The refractive index of the encapsulation layer is N, the maximum emission angle of the light-emitting element is α, the height of the light-emitting element is H1, and the interval between two adjacent light-emitting elements is D1; wherein, N, α, H1, and D1 satisfy: D1≥H1×tanα.
12. The light-emitting substrate according to claim 11, characterized in that, The boundary of the display area away from the peripheral area is the first boundary, the thickness of the encapsulation layer is H2, and the minimum interval between the pixel unit and the first boundary is D2, wherein H2 and D2 satisfy: D2≥H2×tanα.
13. A splicing display device, characterized in that, include: M groups are light-emitting substrates as described in any one of claims 1 to 12, where M is a natural number greater than or equal to 1; the light-emitting substrates in group M are arranged along a first direction, and one group includes two light-emitting substrates arranged along a second direction; The first direction intersects with the second direction; In this group, the two display areas of the two light-emitting substrates are arranged adjacent to each other, and the two peripheral areas of the two light-emitting substrates are respectively located at both ends of the group of light-emitting substrates along the second direction.
14. The splicing display device according to claim 13, characterized in that, The interval between the two closest pixels of the two light-emitting substrates belonging to the same group is equal to the interval between two adjacent pixels within the light-emitting substrate.